diff --git a/ballance_blender_plugin/__init__.py b/ballance_blender_plugin/__init__.py
index f5de843..4f8ace2 100644
--- a/ballance_blender_plugin/__init__.py
+++ b/ballance_blender_plugin/__init__.py
@@ -103,7 +103,7 @@ def menu_func_ballance_add(self, context):
     layout.separator()
     layout.label(text="Ballance")
     layout.operator_menu_enum("ballance.add_elements", "elements_type", icon='MESH_ICOSPHERE', text="Elements")
-    layout.operator("ballance.add_rail", icon='MESH_CUBE', text="Rail section")
+    layout.operator("ballance.add_rail", icon='MESH_CIRCLE', text="Rail section")
     layout.menu(BALLANCE_MT_AddFloorMenu.bl_idname, icon='MESH_CUBE')
 
 def register():
diff --git a/ballance_blender_plugin/add_floor.py b/ballance_blender_plugin/add_floor.py
index 3240b7f..fc3aa15 100644
--- a/ballance_blender_plugin/add_floor.py
+++ b/ballance_blender_plugin/add_floor.py
@@ -1,4 +1,5 @@
 import bpy,mathutils
+import os
 from . import utils, config
 
 class BALLANCE_OT_add_floor(bpy.types.Operator):
@@ -16,18 +17,21 @@ class BALLANCE_OT_add_floor(bpy.types.Operator):
     expand_length_1 : bpy.props.IntProperty(
         name="D1 length",
         description="The length of expand direction 1",
+        min=0,
         default=0,
     )
 
     expand_length_2 : bpy.props.IntProperty(
         name="D2 length",
         description="The length of expand direction 2",
+        min=0,
         default=0,
     )
 
     height_multiplier : bpy.props.FloatProperty(
         name="Height",
         description="The multiplier for height. Default height is 5",
+        min=0.0,
         default=1.0,
     )
 
@@ -62,6 +66,10 @@ class BALLANCE_OT_add_floor(bpy.types.Operator):
         name="Bottom face"
     )
 
+    @classmethod
+    def poll(self, context):
+        prefs = bpy.context.preferences.addons[__package__].preferences
+        return os.path.isdir(prefs.external_folder)
 
     def execute(self, context):
         return {'FINISHED'}
@@ -75,10 +83,23 @@ class BALLANCE_OT_add_floor(bpy.types.Operator):
         col = layout.column()
         col.label(text="Basic param")
         col.prop(self, "floor_type")
+        col.prop(self, "rotation_inside_mesh")
+        col.prop(self, "height_multiplier")
+
+        col.separator()
+        col.label(text="Expand")
         col.prop(self, "expand_length_1")
         col.prop(self, "expand_length_2")
-        col.prop(self, "height_multiplier")
-        col.prop(self, "rotation_inside_mesh")
+        grids = col.grid_flow(columns=3)
+        grids.separator()
+        grids.label(text="X")
+        grids.separator()
+        grids.label(text="X")
+        grids.template_icon(icon_value = config.blenderIcon_floor_dict[self.floor_type])
+        grids.label(text="X")
+        grids.separator()
+        grids.label(text="X")
+        grids.separator()
 
         col.separator()
         col.label(text="Faces")
@@ -88,17 +109,15 @@ class BALLANCE_OT_add_floor(bpy.types.Operator):
 
         col.separator()
         col.label(text="Sides")
-        row = col.row(align=True)
-        row.label(text="")
-        row.prop(self, "use_2d_top")
-        row.label(text="")
-        row = col.row(align=True)
-        row.prop(self, "use_2d_left")
-        row.template_icon(icon_value = config.blenderIcon_floor_dict[self.floor_type])
-        row.prop(self, "use_2d_right")
-        row = col.row(align=True)
-        row.label(text="")
-        row.prop(self, "use_2d_bottom")
-        row.label(text="")
+        grids = col.grid_flow(columns=3)
+        grids.separator()
+        grids.prop(self, "use_2d_top")
+        grids.separator()
+        grids.prop(self, "use_2d_left")
+        grids.template_icon(icon_value = config.blenderIcon_floor_dict[self.floor_type])
+        grids.prop(self, "use_2d_right")
+        grids.separator()
+        grids.prop(self, "use_2d_bottom")
+        grids.separator()
 
 
diff --git a/ballance_blender_plugin/config.py b/ballance_blender_plugin/config.py
index b5944d6..0ae54c8 100644
--- a/ballance_blender_plugin/config.py
+++ b/ballance_blender_plugin/config.py
@@ -118,7 +118,7 @@ component_list = [
 floor_block_dict = {}
 floor_basic_block_list = []
 floor_derived_block_list = []
-with open(os.path.join(os.path.dirname(__file__), "json", "VanillaBlock.json")) as fp:
+with open(os.path.join(os.path.dirname(__file__), "json", "BasicBlock.json")) as fp:
     for item in json.load(fp):
         floor_basic_block_list.append(item["Type"])
         floor_block_dict[item["Type"]] = item
diff --git a/ballance_blender_plugin/json/VanillaBlock.json b/ballance_blender_plugin/json/BasicBlock.json
similarity index 96%
rename from ballance_blender_plugin/json/VanillaBlock.json
rename to ballance_blender_plugin/json/BasicBlock.json
index 90afcd1..4f42b57 100644
--- a/ballance_blender_plugin/json/VanillaBlock.json
+++ b/ballance_blender_plugin/json/BasicBlock.json
@@ -5,6 +5,14 @@
         "UnitSize": "Small",
         "ExpandType": "Column",
         "InitColumnDirection": "PositiveX",
+        "DefaultSideConfig": {
+            "UseTwoDTop": false,
+            "UseTwoDRight": false,
+            "UseTwoDBottom": false,
+            "UseTwoDLeft": true,
+            "UseThreeDTop": true,
+            "UseThreeDBottom": false
+        },
         "ThreeDTopFace": {
             "Vertices": [
                 "2.5,0,0;+d1;;",
diff --git a/ballance_blender_plugin/preferences.py b/ballance_blender_plugin/preferences.py
index 870557c..044ae2c 100644
--- a/ballance_blender_plugin/preferences.py
+++ b/ballance_blender_plugin/preferences.py
@@ -5,7 +5,7 @@ class BallanceBlenderPluginPreferences(bpy.types.AddonPreferences):
 
     external_folder: bpy.props.StringProperty(
         name="External texture folder",
-        description="The Ballance texture folder which will be used buy this plugin to get external texture.",
+        description="The Ballance texture folder which will be used by this plugin to get external texture.",
         )
 
     no_component_collection: bpy.props.StringProperty(