diff --git a/Source/FluidSynthModel.cpp b/Source/FluidSynthModel.cpp
index 27ab5fd..53be85e 100644
--- a/Source/FluidSynthModel.cpp
+++ b/Source/FluidSynthModel.cpp
@@ -12,10 +12,12 @@ using namespace std;
 
 FluidSynthModel::FluidSynthModel(
     AudioProcessorValueTreeState& valueTreeState,
-    SharesParams& sharedParams
+    ValueTree& valueTree
+    // SharesParams& sharedParams
     )
 : valueTreeState{valueTreeState}
-, sharedParams{sharedParams}
+, valueTree{valueTree}
+// , sharedParams{sharedParams}
 //, synth{nullptr}
 , settings{nullptr, nullptr}
 , currentSoundFontAbsPath{}
@@ -24,10 +26,12 @@ FluidSynthModel::FluidSynthModel(
 , sfont_id{0}
 , channel{0}/*,
 mod(nullptr)*/
+{
+    valueTree.addListener(this);
+}
 
-{}
-
-// FluidSynthModel::~FluidSynthModel() {
+FluidSynthModel::~FluidSynthModel() {
+    valueTree.removeListener(this);
     // if (initialised) {
 //        delete_fluid_audio_driver(driver);
         // delete_fluid_synth(synth);
@@ -36,7 +40,7 @@ mod(nullptr)*/
 //        delete settings;
 //        delete_fluid_mod(mod);
     // }
-// }
+ }
 
 int FluidSynthModel::handleMidiEvent(void* data, fluid_midi_event_t* event)
 {
@@ -79,16 +83,16 @@ void FluidSynthModel::initialise() {
     synth = { new_fluid_synth(settings.get()), delete_fluid_synth };
     fluid_synth_set_sample_rate(synth.get(), currentSampleRate);
 
-    valueTreeState.getParameter("soundFontPath")->getValue();
+    // valueTreeState.getParameter("soundFontPath")->getValue();
     // RangedAudioParameter *param {valueTreeState.getParameter("release")};
     // jassert(dynamic_cast<AudioParameterInt*> (param) != nullptr);
     // AudioParameterInt* castParam {dynamic_cast<AudioParameterInt*> (param)};
     // *castParam = m.getControllerValue();
-
-    if (sharedParams.getSoundFontPath().isNotEmpty()) {
-        loadFont(sharedParams.getSoundFontPath());
+    
+//    if (sharedParams.getSoundFontPath().isNotEmpty()) {
+//        loadFont(sharedParams.getSoundFontPath());
 //        changePreset(sharedParams->getBank(), sharedParams->getPreset());
-    }
+//    }
 
     fluid_synth_set_gain(synth.get(), 2.0);
     
@@ -191,10 +195,24 @@ void FluidSynthModel::initialise() {
     // clamps the range to between 0 and 1000, so we'll copy that
     fluid_mod_set_amount(mod.get(), 1000.0f);
     fluid_synth_add_default_mod(synth.get(), mod.get(), FLUID_SYNTH_ADD);
+    
+    valueTree.sendPropertyChangeMessage("soundFontPath");
 
     // initialised = true;
 }
 
+void FluidSynthModel::valueTreePropertyChanged(ValueTree& treeWhosePropertyHasChanged,
+                                               const Identifier& property) {
+    if (&treeWhosePropertyHasChanged == &valueTree) {
+        if (property == Identifier("soundFontPath")) {
+            String soundFontPath{treeWhosePropertyHasChanged.getProperty("soundFontPath", "")};
+            if (soundFontPath.isNotEmpty()) {
+                loadFont(soundFontPath);
+            }
+        }
+    }
+}
+
 void FluidSynthModel::setControllerValue(int controller, int value) {
     fluid_midi_event_t *midi_event(new_fluid_midi_event());
     fluid_midi_event_set_type(midi_event, static_cast<int>(CONTROL_CHANGE));
@@ -300,7 +318,8 @@ void FluidSynthModel::onFileNameChanged(const String &absPath, int bank, int pre
     }
     unloadAndLoadFont(absPath);
     changePreset(bank, preset);
-    sharedParams.setSoundFontPath(absPath);
+    valueTree.setPropertyExcludingListener(this, "soundFontPath", absPath, nullptr);
+//    sharedParams.setSoundFontPath(absPath);
     eventListeners.call(&FluidSynthModel::Listener::fontChanged, this, absPath);
 }
 
diff --git a/Source/FluidSynthModel.h b/Source/FluidSynthModel.h
index 85a0b94..a5f2c05 100644
--- a/Source/FluidSynthModel.h
+++ b/Source/FluidSynthModel.h
@@ -17,13 +17,14 @@
 
 using namespace std;
 
-class FluidSynthModel {
+class FluidSynthModel: public ValueTree::Listener {
 public:
     FluidSynthModel(
         AudioProcessorValueTreeState& valueTreeState,
-        SharesParams& sharedParams
+        // SharesParams& sharedParams
+        ValueTree& valueTree
         );
-    // ~FluidSynthModel();
+     ~FluidSynthModel();
 
     shared_ptr<fluid_synth_t> getSynth();
     void initialise();
@@ -66,15 +67,54 @@ public:
     void setSampleRate(float sampleRate);
 
     const String& getCurrentSoundFontAbsPath();
+    
+    
+    virtual void valueTreePropertyChanged (ValueTree& treeWhosePropertyHasChanged,
+                                           const Identifier& property) override;
+    inline virtual void valueTreeChildAdded (ValueTree& parentTree,
+                                             ValueTree& childWhichHasBeenAdded) override {};
+    inline virtual void valueTreeChildRemoved (ValueTree& parentTree,
+                                               ValueTree& childWhichHasBeenRemoved,
+                                               int indexFromWhichChildWasRemoved) override {};
+    inline virtual void valueTreeChildOrderChanged (ValueTree& parentTreeWhoseChildrenHaveMoved,
+                                                    int oldIndex, int newIndex) override {};
+    inline virtual void valueTreeParentChanged (ValueTree& treeWhoseParentHasChanged) override {};
+    inline virtual void valueTreeRedirected (ValueTree& treeWhichHasBeenChanged) override {};
 
 private:
+//    class ValueTreeListener: public ValueTree::Listener {
+//    public:
+////        ValueTreeListener();
+////        ~ValueTreeListener();
+//        virtual void valueTreePropertyChanged (ValueTree& treeWhosePropertyHasChanged,
+//                                               const Identifier& property) override;
+//        inline virtual void valueTreeChildAdded (ValueTree& parentTree,
+//                                          ValueTree& childWhichHasBeenAdded) override {};
+//        inline virtual void valueTreeChildRemoved (ValueTree& parentTree,
+//                                            ValueTree& childWhichHasBeenRemoved,
+//                                            int indexFromWhichChildWasRemoved) override {};
+//        inline virtual void valueTreeChildOrderChanged (ValueTree& parentTreeWhoseChildrenHaveMoved,
+//                                                 int oldIndex, int newIndex) override {};
+//        inline virtual void valueTreeParentChanged (ValueTree& treeWhoseParentHasChanged) override {};
+//        inline virtual void valueTreeRedirected (ValueTree& treeWhichHasBeenChanged) override {};
+//        JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ValueTreeListener)
+//    };
+
     int handleMidiEvent(void* data, fluid_midi_event_t* event);
+    
+//    ValueTreeListener valueTreeListener;
 
     AudioProcessorValueTreeState& valueTreeState;
-    SharesParams& sharedParams;
+    // SharesParams& sharedParams;
+    ValueTree& valueTree;
 
-    shared_ptr<fluid_synth_t> synth;
+    // https://stackoverflow.com/questions/38980315/is-stdunique-ptr-deletion-order-guaranteed
+    // members are destroyed in reverse of the order they're declared
+    // http://www.fluidsynth.org/api/
+    // in their examples, they destroy the synth before destroying the settings
     unique_ptr<fluid_settings_t, decltype(&delete_fluid_settings)> settings;
+    // TODO: shared_ptr may ruin our guarantee of synth's being destroyed first, so consider changing the access we expose
+    shared_ptr<fluid_synth_t> synth;
     // unique_ptr<fluid_midi_driver_t, decltype(&delete_fluid_midi_driver)> midiDriver;
 
     String currentSoundFontAbsPath;
diff --git a/Source/Params.cpp b/Source/Params.cpp
index 88c0046..4f6c9cc 100644
--- a/Source/Params.cpp
+++ b/Source/Params.cpp
@@ -15,9 +15,9 @@
 using namespace std;
 
 Params::Params() noexcept
-: uiWidth{GuiConstants::minWidth}
-, uiHeight{GuiConstants::minHeight}
-, soundFontPath{String()}
+// : uiWidth{GuiConstants::minWidth}
+// , uiHeight{GuiConstants::minHeight}
+: soundFontPath{String()}
 // , preset{-1}
 // , bank{-1}
 // , attack{0}
@@ -30,8 +30,8 @@ Params::Params() noexcept
 }
 
 void Params::setAttributesOnXml(shared_ptr<XmlElement> xml) {
-    xml->setAttribute("uiWidth", uiWidth);
-    xml->setAttribute("uiHeight", uiHeight);
+    // xml->setAttribute("uiWidth", uiWidth);
+    // xml->setAttribute("uiHeight", uiHeight);
     xml->setAttribute("soundFontPath", soundFontPath);
     // xml.setAttribute("preset", preset);
     // xml.setAttribute("bank", bank);
@@ -44,8 +44,8 @@ void Params::setAttributesOnXml(shared_ptr<XmlElement> xml) {
 }
 
 void Params::loadAttributesFromXml(shared_ptr<XmlElement> xmlState) {
-    uiWidth = jmin(jmax(xmlState->getIntAttribute("uiWidth", uiWidth), GuiConstants::minWidth), GuiConstants::maxWidth);
-    uiHeight = jmin(jmax(xmlState->getIntAttribute("uiHeight", uiHeight), GuiConstants::minHeight), GuiConstants::maxHeight);
+    // uiWidth = jmin(jmax(xmlState->getIntAttribute("uiWidth", uiWidth), GuiConstants::minWidth), GuiConstants::maxWidth);
+    // uiHeight = jmin(jmax(xmlState->getIntAttribute("uiHeight", uiHeight), GuiConstants::minHeight), GuiConstants::maxHeight);
     soundFontPath = xmlState->getStringAttribute("soundFontPath", soundFontPath);
     // preset = xmlState->getIntAttribute("preset", preset);
     // bank = xmlState->getIntAttribute("bank", bank);
@@ -95,12 +95,12 @@ String& Params::getSoundFontPath() {
 //int Params::getBank() {
 //    return bank;
 //}
-int Params::getUiWidth() {
-    return uiWidth;
-}
-int Params::getUiHeight() {
-    return uiHeight;
-}
+// int Params::getUiWidth() {
+//     return uiWidth;
+// }
+// int Params::getUiHeight() {
+//     return uiHeight;
+// }
 //int Params::getAttack() {
 //    return attack;
 //}
@@ -126,12 +126,12 @@ int Params::getUiHeight() {
 //void Params::setBank(int value) {
 //    bank = value;
 //}
-void Params::setUiWidth(int value) {
-    uiWidth = value;
-}
-void Params::setUiHeight(int value) {
-    uiHeight = value;
-}
+// void Params::setUiWidth(int value) {
+//     uiWidth = value;
+// }
+// void Params::setUiHeight(int value) {
+//     uiHeight = value;
+// }
 //void Params::setAttack(int value) {
 //    attack = value;
 //}
diff --git a/Source/Params.h b/Source/Params.h
index 7452da2..678c16f 100644
--- a/Source/Params.h
+++ b/Source/Params.h
@@ -20,10 +20,10 @@ public:
     // virtual int getBank() override;
     // virtual void setBank(int value) override;
 
-    virtual int getUiWidth() override;
-    virtual void setUiWidth(int value) override;
-    virtual int getUiHeight() override;
-    virtual void setUiHeight(int value) override;
+    // virtual int getUiWidth() override;
+    // virtual void setUiWidth(int value) override;
+    // virtual int getUiHeight() override;
+    // virtual void setUiHeight(int value) override;
 
     // virtual int getAttack() override;
     // virtual void setAttack(int value) override;
@@ -40,8 +40,8 @@ public:
     // virtual void setFilterResonance(int value) override;
 
 private:
-    int uiWidth;
-    int uiHeight;
+    // int uiWidth;
+    // int uiHeight;
 
     String soundFontPath;
     // int preset;
diff --git a/Source/PluginEditor.cpp b/Source/PluginEditor.cpp
index f6d5355..6050aff 100644
--- a/Source/PluginEditor.cpp
+++ b/Source/PluginEditor.cpp
@@ -13,15 +13,17 @@
 #include "GuiConstants.h"
 
 //==============================================================================
-JuicySFAudioProcessorEditor::JuicySFAudioProcessorEditor(JuicySFAudioProcessor& p, AudioProcessorValueTreeState& valueTreeState)
-    : AudioProcessorEditor{&p},
-      processor{p},
-      valueTreeState{valueTreeState},
-      sharedParams{p.getSharedParams()},
-      midiKeyboard{p.keyboardState, SurjectiveMidiKeyboardComponent::horizontalKeyboard},
-      tablesComponent{valueTreeState, p.getFluidSynthModel()},
-      filePicker{valueTreeState, p.getFluidSynthModel()},
-      slidersComponent{p.getSharedParams(), valueTreeState, p.getFluidSynthModel()}
+JuicySFAudioProcessorEditor::JuicySFAudioProcessorEditor(
+    JuicySFAudioProcessor& p,
+    AudioProcessorValueTreeState& valueTreeState)
+: AudioProcessorEditor{&p}
+, processor{p}
+, valueTreeState{valueTreeState}
+    //   sharedParams{p.getSharedParams()},
+, midiKeyboard{p.keyboardState, SurjectiveMidiKeyboardComponent::horizontalKeyboard}
+, tablesComponent{valueTreeState, p.getFluidSynthModel()}
+, filePicker{valueTreeState, p.getFluidSynthModel()}
+, slidersComponent{valueTreeState, p.getFluidSynthModel()}
 {
     // set resize limits for this plug-in
     setResizeLimits(
@@ -29,8 +31,29 @@ JuicySFAudioProcessorEditor::JuicySFAudioProcessorEditor(JuicySFAudioProcessor&
         GuiConstants::minHeight,
         GuiConstants::maxWidth,
         GuiConstants::maxHeight);
+    
+    // int width, height;
+    // {
+    //     RangedAudioParameter *param {valueTreeState.getParameter("uiWidth")};
+    //     jassert(dynamic_cast<AudioParameterInt*> (param) != nullptr);
+    //     AudioParameterInt* castParam {dynamic_cast<AudioParameterInt*> (param)};
+    //     width = castParam->get();
+    // }
+    // {
+    //     RangedAudioParameter *param {valueTreeState.getParameter("uiHeight")};
+    //     jassert(dynamic_cast<AudioParameterInt*> (param) != nullptr);
+    //     AudioParameterInt* castParam {dynamic_cast<AudioParameterInt*> (param)};
+    //     height = castParam->get();
+    // }
 
-    setSize(sharedParams.getUiWidth(), sharedParams.getUiHeight());
+    // valueTreeState.addParameterListener("uiWidthPersist", this);
+    // valueTreeState.addParameterListener("uiHeightPersist", this);
+    // valueTreeState.addParameterListener("uiWidth", this);
+    // valueTreeState.addParameterListener("uiHeight", this);
+
+    valueTreeState.state.addListener(this);
+
+    setSize(GuiConstants::minWidth, GuiConstants::minHeight);
 
 //    processor.subscribeToStateChanges(this);
 
@@ -50,9 +73,53 @@ JuicySFAudioProcessorEditor::JuicySFAudioProcessorEditor(JuicySFAudioProcessor&
 
 JuicySFAudioProcessorEditor::~JuicySFAudioProcessorEditor()
 {
+    // valueTreeState.removeParameterListener("uiWidthPersist", this);
+    // valueTreeState.removeParameterListener("uiHeightPersist", this);
+    // valueTreeState.removeParameterListener("uiWidth", this);
+    // valueTreeState.removeParameterListener("uiHeight", this);
+    valueTreeState.state.removeListener(this);
 //    processor.unsubscribeFromStateChanges(this);
 }
 
+void JuicySFAudioProcessorEditor::valueTreePropertyChanged(ValueTree& treeWhosePropertyHasChanged,
+                                               const Identifier& property) {
+    if (&treeWhosePropertyHasChanged == &valueTreeState.state) {
+        if (property == Identifier("uiWidth")) {
+            // String soundFontPath{treeWhosePropertyHasChanged.getProperty("soundFontPath", "")};
+            // if (soundFontPath.isNotEmpty()) {
+            //     loadFont(soundFontPath);
+            // }
+            int value{treeWhosePropertyHasChanged.getProperty("uiWidth", GuiConstants::minWidth)};
+            setSize(value, getHeight());
+        } else if (property == Identifier("uiHeight")) {
+            int value{treeWhosePropertyHasChanged.getProperty("uiHeight", GuiConstants::minHeight)};
+            setSize(getWidth(), value);
+        }
+    }
+}
+
+// void JuicySFAudioProcessorEditor::parameterChanged(const String& parameterID, float newValue) {
+//     // if (parameterID == "uiWidthPersist"
+//     // || parameterID == "uiHeightPersist") {
+//     if (parameterID == "uiWidth"
+//     || parameterID == "uiHeight") {
+//         RangedAudioParameter *param {valueTreeState.getParameter(parameterID)};
+//         jassert(dynamic_cast<AudioParameterInt*> (param) != nullptr);
+//         AudioParameterInt* castParam {dynamic_cast<AudioParameterInt*> (param)};
+//         int value{castParam->get()};
+//         // if (parameterID == "uiWidthPersist") {
+//         //     setSize(value, getHeight());
+//         // } else if (parameterID == "uiHeightPersist") {
+//         //     setSize(getWidth(), value);
+//         // }
+//         if (parameterID == "uiWidth") {
+//             setSize(value, getHeight());
+//         } else if (parameterID == "uiHeight") {
+//             setSize(getWidth(), value);
+//         }
+//     }
+// }
+
 //void JuicySFAudioProcessorEditor::getStateInformation (XmlElement& xml) {
 //    // save
 //    xml.setAttribute ("uiWidth", getWidth());
@@ -104,8 +171,24 @@ void JuicySFAudioProcessorEditor::resized()
 
     tablesComponent.setBounds(rContent);
 
-    sharedParams.setUiWidth(getWidth());
-    sharedParams.setUiHeight(getHeight());
+    valueTreeState.state.setPropertyExcludingListener(this, "uiWidth", getWidth(), nullptr);
+    valueTreeState.state.setPropertyExcludingListener(this, "uiHeight", getHeight(), nullptr);
+    
+    // {
+    //     RangedAudioParameter *param {valueTreeState.getParameter("uiWidth2")};
+    //     jassert(dynamic_cast<AudioParameterInt*> (param) != nullptr);
+    //     AudioParameterInt* castParam {dynamic_cast<AudioParameterInt*> (param)};
+    //     *castParam = getWidth();
+    // }
+    // {
+    //     RangedAudioParameter *param {valueTreeState.getParameter("uiHeight2")};
+    //     jassert(dynamic_cast<AudioParameterInt*> (param) != nullptr);
+    //     AudioParameterInt* castParam {dynamic_cast<AudioParameterInt*> (param)};
+    //     *castParam = getHeight();
+    // }
+
+//    sharedParams.setUiWidth(getWidth());
+//    sharedParams.setUiHeight(getHeight());
 
 //    Rectangle<int> r2 (getLocalBounds());
 //    r2.reduce(0, padding);
@@ -154,10 +237,10 @@ bool JuicySFAudioProcessorEditor::keyStateChanged (bool isKeyDown) {
 //    return false;
 }
 
-FilePickerFragment& JuicySFAudioProcessorEditor::getFilePicker() {
-    return filePicker;
-}
-
-SlidersFragment& JuicySFAudioProcessorEditor::getSliders() {
-    return slidersComponent;
-}
+//FilePickerFragment& JuicySFAudioProcessorEditor::getFilePicker() {
+//    return filePicker;
+//}
+//
+//SlidersFragment& JuicySFAudioProcessorEditor::getSliders() {
+//    return slidersComponent;
+//}
diff --git a/Source/PluginEditor.h b/Source/PluginEditor.h
index 51255ef..68ed6f5 100644
--- a/Source/PluginEditor.h
+++ b/Source/PluginEditor.h
@@ -23,14 +23,18 @@
 //==============================================================================
 /**
 */
-class JuicySFAudioProcessorEditor  : public AudioProcessorEditor,
-                                     public ExposesComponents/*,
+class JuicySFAudioProcessorEditor
+: public AudioProcessorEditor
+// , public AudioProcessorValueTreeState::Listener
+, public ValueTree::Listener
+                      /*,
+                                     , public ExposesComponents
                                      public StateChangeSubscriber*/
 {
 public:
     JuicySFAudioProcessorEditor(
       JuicySFAudioProcessor&,
-      AudioProcessorValueTreeState& state
+      AudioProcessorValueTreeState& valueTreeState
       );
     ~JuicySFAudioProcessorEditor();
 
@@ -44,16 +48,33 @@ public:
 //    void getStateInformation (XmlElement& xml) override;
 //    void setStateInformation (XmlElement* xmlState) override;
 
-    virtual FilePickerFragment& getFilePicker() override;
-    virtual SlidersFragment& getSliders() override;
+    // virtual FilePickerFragment& getFilePicker() override;
+    // virtual SlidersFragment& getSliders() override;
+    // virtual void parameterChanged (const String& parameterID, float newValue) override;
+
+    // int getWidth();
+    // int getHeight();
+
+    virtual void valueTreePropertyChanged (ValueTree& treeWhosePropertyHasChanged,
+                                           const Identifier& property) override;
+    inline virtual void valueTreeChildAdded (ValueTree& parentTree,
+                                             ValueTree& childWhichHasBeenAdded) override {};
+    inline virtual void valueTreeChildRemoved (ValueTree& parentTree,
+                                               ValueTree& childWhichHasBeenRemoved,
+                                               int indexFromWhichChildWasRemoved) override {};
+    inline virtual void valueTreeChildOrderChanged (ValueTree& parentTreeWhoseChildrenHaveMoved,
+                                                    int oldIndex, int newIndex) override {};
+    inline virtual void valueTreeParentChanged (ValueTree& treeWhoseParentHasChanged) override {};
+    inline virtual void valueTreeRedirected (ValueTree& treeWhichHasBeenChanged) override {};
 
 private:
+
     // This reference is provided as a quick way for your editor to
     // access the processor object that created it.
     JuicySFAudioProcessor& processor;
 
     AudioProcessorValueTreeState& valueTreeState;
-    SharesParams& sharedParams;
+    // SharesParams& sharedParams;
 
     SurjectiveMidiKeyboardComponent midiKeyboard;
     TablesComponent tablesComponent;
diff --git a/Source/PluginProcessor.cpp b/Source/PluginProcessor.cpp
index 0a3716f..952cf2c 100644
--- a/Source/PluginProcessor.cpp
+++ b/Source/PluginProcessor.cpp
@@ -17,7 +17,7 @@
 #include "Util.h"
 #include "SharesParams.h"
 #include "Params.h"
-#include "MidiConstants.h"
+#include "GuiConstants.h"
 
 using namespace std;
 using Parameter = AudioProcessorValueTreeState::Parameter;
@@ -29,13 +29,13 @@ AudioProcessor* JUCE_CALLTYPE createPluginFilter();
 //, sharedParams{static_pointer_cast<SharesParams>(make_shared<Params>())}
 JuicySFAudioProcessor::JuicySFAudioProcessor()
 : AudioProcessor{getBusesProperties()}
-, sharedParams{}
+// , sharedParams{}
 , valueTreeState{
     *this,
     nullptr,
     { "MYPLUGINSETTINGS" },
     createParameterLayout()}
-, fluidSynthModel{valueTreeState, sharedParams}
+, fluidSynthModel{valueTreeState, valueTree}
 //, fluidSynthModel{*this}
 //, pluginEditor(nullptr)
 {
@@ -53,15 +53,22 @@ AudioProcessorValueTreeState::ParameterLayout JuicySFAudioProcessor::createParam
 
     // https://stackoverflow.com/a/8469002/5257399
     unique_ptr<AudioParameterInt> params[] {
-        make_unique<AudioParameterInt>("bank", "which bank is selected in the soundfont", 0, 127, 0, "Bank" ),
+        // make_unique<AudioParameterInt>("uiWidthPersist", "width of this plugin's GUI. Editor listens for changes (e.g. on load)", GuiConstants::minWidth, GuiConstants::maxWidth, GuiConstants::minWidth, "UI Width Persist" ),
+        // make_unique<AudioParameterInt>("uiHeightPersist", "height of this plugin's GUI. Editor listens for changes (e.g. on load)", GuiConstants::minHeight, GuiConstants::maxHeight, GuiConstants::minHeight, "UI Height Persist" ),
+        // make_unique<AudioParameterInt>("uiWidthTemp", "width of this plugin's GUI. Editor writes here on change (e.g. on window resize). Processor copies this into Persist before any save.", GuiConstants::minWidth, GuiConstants::maxWidth, GuiConstants::minWidth, "UI Width Temp" ),
+        // make_unique<AudioParameterInt>("uiHeightTemp", "height of this plugin's GUI. Editor writes here on change (e.g. on window resize). Processor copies this into Persist before any save.", GuiConstants::minHeight, GuiConstants::maxHeight, GuiConstants::minHeight, "UI Height Temp" ),
+        make_unique<AudioParameterInt>("uiWidth", "width of this plugin's GUI", GuiConstants::minWidth, GuiConstants::maxWidth, GuiConstants::minWidth, "UI Width" ),
+        make_unique<AudioParameterInt>("uiHeight", "height of this plugin's GUI", GuiConstants::minHeight, GuiConstants::maxHeight, GuiConstants::minHeight, "UI Height" ),
+        // todo: check whether bank really is 0-127
+        make_unique<AudioParameterInt>("bank", "which bank is selected in the soundfont", MidiConstants::midiMinValue, MidiConstants::midiMaxValue, MidiConstants::midiMinValue, "Bank" ),
         // note: banks may be sparse, and lack a 0th preset. so defend against this.
-        make_unique<AudioParameterInt>("preset", "which patch (aka patch, program, instrument) is selected in the soundfont", 0, 127, 0, "Preset" ),
-        make_unique<AudioParameterInt>("attack", "volume envelope attack time", 0, 127, 0, "A" ),
-        make_unique<AudioParameterInt>("decay", "volume envelope sustain attentuation", 0, 127, 0, "D" ),
-        make_unique<AudioParameterInt>("sustain", "volume envelope decay time", 0, 127, 0, "S" ),
-        make_unique<AudioParameterInt>("release", "volume envelope release time", 0, 127, 0, "R" ),
-        make_unique<AudioParameterInt>("filterCutOff", "low-pass filter cut-off frequency", 0, 127, 0, "Cut" ),
-        make_unique<AudioParameterInt>("filterResonance", "low-pass filter resonance attentuation", 0, 127, 0, "Res" ),
+        make_unique<AudioParameterInt>("preset", "which patch (aka patch, program, instrument) is selected in the soundfont", MidiConstants::midiMinValue, MidiConstants::midiMaxValue, MidiConstants::midiMinValue, "Preset" ),
+        make_unique<AudioParameterInt>("attack", "volume envelope attack time", MidiConstants::midiMinValue, MidiConstants::midiMaxValue, MidiConstants::midiMinValue, "A" ),
+        make_unique<AudioParameterInt>("decay", "volume envelope sustain attentuation", MidiConstants::midiMinValue, MidiConstants::midiMaxValue, MidiConstants::midiMinValue, "D" ),
+        make_unique<AudioParameterInt>("sustain", "volume envelope decay time", MidiConstants::midiMinValue, MidiConstants::midiMaxValue, MidiConstants::midiMinValue, "S" ),
+        make_unique<AudioParameterInt>("release", "volume envelope release time", MidiConstants::midiMinValue, MidiConstants::midiMaxValue, MidiConstants::midiMinValue, "R" ),
+        make_unique<AudioParameterInt>("filterCutOff", "low-pass filter cut-off frequency", MidiConstants::midiMinValue, MidiConstants::midiMaxValue, MidiConstants::midiMinValue, "Cut" ),
+        make_unique<AudioParameterInt>("filterResonance", "low-pass filter resonance attentuation", MidiConstants::midiMinValue, MidiConstants::midiMaxValue, MidiConstants::midiMinValue, "Res" ),
     };
     
     return {
@@ -215,7 +222,7 @@ void JuicySFAudioProcessor::processBlock (AudioBuffer<float>& buffer, MidiBuffer
             fluid_midi_event_set_channel(midi_event, fluidSynthModel.getChannel());
             fluid_midi_event_set_control(midi_event, m.getControllerNumber());
             fluid_midi_event_set_value(midi_event, m.getControllerValue());
-            fluid_synth_handle_midi_event(fluidSynth, midi_event);
+            fluid_synth_handle_midi_event(fluidSynthModel.getSynth().get(), midi_event);
             delete_fluid_midi_event(midi_event);
             
             switch(static_cast<fluid_midi_control_change>(m.getControllerNumber())) {
@@ -274,21 +281,21 @@ void JuicySFAudioProcessor::processBlock (AudioBuffer<float>& buffer, MidiBuffer
             fluid_midi_event_set_type(midi_event, static_cast<int>(PROGRAM_CHANGE));
             fluid_midi_event_set_channel(midi_event, fluidSynthModel.getChannel());
             fluid_midi_event_set_program(midi_event, m.getProgramChangeNumber());
-            fluid_synth_handle_midi_event(fluidSynth, midi_event);
+            fluid_synth_handle_midi_event(fluidSynthModel.getSynth().get(), midi_event);
             delete_fluid_midi_event(midi_event);
         } else if (m.isPitchWheel()) {
             fluid_midi_event_t *midi_event(new_fluid_midi_event());
             fluid_midi_event_set_type(midi_event, static_cast<int>(PITCH_BEND));
             fluid_midi_event_set_channel(midi_event, fluidSynthModel.getChannel());
             fluid_midi_event_set_pitch(midi_event, m.getPitchWheelValue());
-            fluid_synth_handle_midi_event(fluidSynth, midi_event);
+            fluid_synth_handle_midi_event(fluidSynthModel.getSynth().get(), midi_event);
             delete_fluid_midi_event(midi_event);
         } else if (m.isChannelPressure()) {
             fluid_midi_event_t *midi_event(new_fluid_midi_event());
             fluid_midi_event_set_type(midi_event, static_cast<int>(CHANNEL_PRESSURE));
             fluid_midi_event_set_channel(midi_event, fluidSynthModel.getChannel());
             fluid_midi_event_set_program(midi_event, m.getChannelPressureValue());
-            fluid_synth_handle_midi_event(fluidSynth, midi_event);
+            fluid_synth_handle_midi_event(fluidSynthModel.getSynth().get(), midi_event);
             delete_fluid_midi_event(midi_event);
         } else if (m.isAftertouch()) {
             fluid_midi_event_t *midi_event(new_fluid_midi_event());
@@ -296,12 +303,12 @@ void JuicySFAudioProcessor::processBlock (AudioBuffer<float>& buffer, MidiBuffer
             fluid_midi_event_set_channel(midi_event, fluidSynthModel.getChannel());
             fluid_midi_event_set_key(midi_event, m.getNoteNumber());
             fluid_midi_event_set_value(midi_event, m.getAfterTouchValue());
-            fluid_synth_handle_midi_event(fluidSynth, midi_event);
+            fluid_synth_handle_midi_event(fluidSynthModel.getSynth().get(), midi_event);
             delete_fluid_midi_event(midi_event);
 //        } else if (m.isMetaEvent()) {
 //            fluid_midi_event_t *midi_event(new_fluid_midi_event());
 //            fluid_midi_event_set_type(midi_event, static_cast<int>(MIDI_SYSTEM_RESET));
-//            fluid_synth_handle_midi_event(fluidSynth, midi_event);
+//            fluid_synth_handle_midi_event(fluidSynthModel.getSynth().get(), midi_event);
 //            delete_fluid_midi_event(midi_event);
         } else if (m.isSysEx()) {
             fluid_midi_event_t *midi_event(new_fluid_midi_event());
@@ -309,7 +316,7 @@ void JuicySFAudioProcessor::processBlock (AudioBuffer<float>& buffer, MidiBuffer
             // I assume that the MidiMessage's sysex buffer would be freed anyway when MidiMessage is destroyed, so set dynamic=false
             // to ensure that fluidsynth does not attempt to free the sysex buffer during delete_fluid_midi_event()
             fluid_midi_event_set_sysex(midi_event, const_cast<juce::uint8*>(m.getSysExData()), m.getSysExDataSize(), static_cast<int>(false));
-            fluid_synth_handle_midi_event(fluidSynth, midi_event);
+            fluid_synth_handle_midi_event(fluidSynthModel.getSynth().get(), midi_event);
             delete_fluid_midi_event(midi_event);
         }
     }
@@ -324,7 +331,7 @@ void JuicySFAudioProcessor::processBlock (AudioBuffer<float>& buffer, MidiBuffer
 
     // and now get our synth to process these midi events and generate its output.
     synth.renderNextBlock (buffer, midiMessages, 0, numSamples);
-    fluid_synth_process(fluidSynth, numSamples, 0, nullptr, buffer.getNumChannels(), buffer.getArrayOfWritePointers());
+    fluid_synth_process(fluidSynthModel.getSynth().get(), numSamples, 0, nullptr, buffer.getNumChannels(), buffer.getArrayOfWritePointers());
 
     // (see juce_VST3_Wrapper.cpp for the assertion this would trip otherwise)
     // we are !JucePlugin_ProducesMidiOutput, so clear remaining MIDI messages from our buffer
@@ -364,7 +371,7 @@ void JuicySFAudioProcessor::getStateInformation (MemoryBlock& destData)
 //    sharedParams->setAttributesOnXml(xml);
     auto state{valueTreeState.copyState()};
     shared_ptr<XmlElement> xml{state.createXml()};
-    sharedParams.setAttributesOnXml(xml);
+//    sharedParams.setAttributesOnXml(xml);
 
 //    list<StateChangeSubscriber*>::iterator p;
 //    for(p = stateChangeSubscribers.begin(); p != stateChangeSubscribers.end(); p++) {
@@ -399,7 +406,7 @@ void JuicySFAudioProcessor::setStateInformation (const void* data, int sizeInByt
 //            }
 
             // ok, now pull out our last window size..
-           sharedParams.loadAttributesFromXml(xmlState);
+//           sharedParams.loadAttributesFromXml(xmlState);
 
             // Now reload our parameters..
             
@@ -448,9 +455,9 @@ FluidSynthModel& JuicySFAudioProcessor::getFluidSynthModel() {
     return fluidSynthModel;
 }
 
-SharesParams& JuicySFAudioProcessor::getSharedParams() {
-    return sharedParams;
-}
+//SharesParams& JuicySFAudioProcessor::getSharedParams() {
+//    return sharedParams;
+//}
 
 //==============================================================================
 // This creates new instances of the plugin..
diff --git a/Source/PluginProcessor.h b/Source/PluginProcessor.h
index 33b3a37..08a7c41 100644
--- a/Source/PluginProcessor.h
+++ b/Source/PluginProcessor.h
@@ -64,7 +64,7 @@ public:
     bool supportsDoublePrecisionProcessing() const override;
 
     FluidSynthModel& getFluidSynthModel();
-    SharesParams& getSharedParams();
+//    SharesParams& getSharedParams();
 
     MidiKeyboardState keyboardState;
 
@@ -74,11 +74,12 @@ public:
 private:
     void initialiseSynth();
 
-    Params sharedParams;
+//    Params sharedParams;
     AudioProcessorValueTreeState valueTreeState;
+    ValueTree valueTree;
 
     FluidSynthModel fluidSynthModel;
-    fluid_synth_t* fluidSynth;
+    // fluid_synth_t* fluidSynth;
     Synthesiser synth;
 
 //    // just a raw pointer; we do not own
diff --git a/Source/SharesParams.h b/Source/SharesParams.h
index 5b9621c..88740b3 100644
--- a/Source/SharesParams.h
+++ b/Source/SharesParams.h
@@ -24,10 +24,10 @@ public:
     // virtual int getBank() = 0;
     // virtual void setBank(int value) = 0;
 
-    virtual int getUiWidth() = 0;
-    virtual void setUiWidth(int value) = 0;
-    virtual int getUiHeight() = 0;
-    virtual void setUiHeight(int value) = 0;
+    // virtual int getUiWidth() = 0;
+    // virtual void setUiWidth(int value) = 0;
+    // virtual int getUiHeight() = 0;
+    // virtual void setUiHeight(int value) = 0;
     
     // virtual int getAttack() = 0;
     // virtual void setAttack(int value) = 0;
diff --git a/Source/SlidersComponent.cpp b/Source/SlidersComponent.cpp
index 196ce1f..5a4f787 100644
--- a/Source/SlidersComponent.cpp
+++ b/Source/SlidersComponent.cpp
@@ -115,11 +115,11 @@ void SlidersComponent::acceptMidiControlEvent(int controller, int value) {
 // }
 
 SlidersComponent::SlidersComponent(
-    SharesParams& sharedParams,
+    // SharesParams& sharedParams,
     AudioProcessorValueTreeState& valueTreeState,
     FluidSynthModel& fluidSynthModel)
-: sharedParams{sharedParams}
-, valueTreeState{valueTreeState}
+// : sharedParams{sharedParams}
+: valueTreeState{valueTreeState}
 , fluidSynthModel{fluidSynthModel}
 , envelopeGroup{"envelopeGroup", "Envelope"}
 , filterGroup{"filterGroup", "Filter"}
diff --git a/Source/SlidersComponent.h b/Source/SlidersComponent.h
index c2c9d4e..47bdfa8 100644
--- a/Source/SlidersComponent.h
+++ b/Source/SlidersComponent.h
@@ -13,7 +13,7 @@ class SlidersComponent : public Component,
 {
 public:
     SlidersComponent(
-        SharesParams& sharedParams,
+        // SharesParams& sharedParams,
         AudioProcessorValueTreeState& valueTreeState,
         FluidSynthModel& fluidSynthModel);
     ~SlidersComponent();
@@ -35,7 +35,7 @@ public:
 private:
     std::function<void()> makeSliderListener(Slider& slider, int controller);
 
-    SharesParams& sharedParams;
+    // SharesParams& sharedParams;
     AudioProcessorValueTreeState& valueTreeState;
     FluidSynthModel& fluidSynthModel;