diff --git a/Packages/net.fushizen.modular-avatar/Editor/AnimatorMerger.cs b/Packages/net.fushizen.modular-avatar/Editor/AnimatorMerger.cs
index 0f6baa57..f3f3488a 100644
--- a/Packages/net.fushizen.modular-avatar/Editor/AnimatorMerger.cs
+++ b/Packages/net.fushizen.modular-avatar/Editor/AnimatorMerger.cs
@@ -37,7 +37,7 @@ namespace net.fushizen.modular_avatar.core.editor
         private readonly AnimatorController _combined;
 
         private List<AnimatorControllerLayer> _layers = new List<AnimatorControllerLayer>();
-        
+
         private Dictionary<String, AnimatorControllerParameter> _parameters =
             new Dictionary<string, AnimatorControllerParameter>();
 
@@ -49,7 +49,7 @@ namespace net.fushizen.modular_avatar.core.editor
 
         public AnimatorCombiner()
         {
-            _combined = Util.CreateContainer();
+            _combined = Util.CreateAnimator();
         }
 
         public AnimatorController Finish()
@@ -67,12 +67,13 @@ namespace net.fushizen.modular_avatar.core.editor
                 {
                     if (acp.type != param.type)
                     {
-                        throw new Exception($"Parameter {param.name} has different types in {basePath} and {controller.name}");
+                        throw new Exception(
+                            $"Parameter {param.name} has different types in {basePath} and {controller.name}");
                     }
 
                     continue;
                 }
-                
+
                 _parameters.Add(param.name, param);
             }
 
@@ -109,7 +110,7 @@ namespace net.fushizen.modular_avatar.core.editor
             {
                 return asm;
             }
-            
+
             asm = deepClone(layerStateMachine, (obj) => customClone(obj, basePath));
 
             _stateMachines[cacheKey] = asm;
@@ -127,11 +128,11 @@ namespace net.fushizen.modular_avatar.core.editor
                 return PathMappings.MapPath(basePath + binding.path, binding.type == typeof(Transform));
             }
         }
-        
+
         private Object customClone(Object o, string basePath)
         {
             if (basePath == "") return null;
-            
+
             if (o is AnimationClip clip)
             {
                 AnimationClip newClip = new AnimationClip();
@@ -145,7 +146,7 @@ namespace net.fushizen.modular_avatar.core.editor
                     newClip.SetCurve(newBinding.path, newBinding.type, newBinding.propertyName,
                         AnimationUtility.GetEditorCurve(clip, binding));
                 }
-                
+
                 foreach (var objBinding in AnimationUtility.GetObjectReferenceCurveBindings(clip))
                 {
                     var newBinding = objBinding;
@@ -161,7 +162,8 @@ namespace net.fushizen.modular_avatar.core.editor
                 AnimationUtility.SetAnimationClipSettings(newClip, AnimationUtility.GetAnimationClipSettings(clip));
 
                 return newClip;
-            } else if (o is Texture)
+            }
+            else if (o is Texture)
             {
                 return o;
             }
@@ -174,12 +176,12 @@ namespace net.fushizen.modular_avatar.core.editor
         private T deepClone<T>(T original,
             Func<Object, Object> visitor,
             Dictionary<Object, Object> cloneMap = null
-            ) where T : Object
+        ) where T : Object
         {
             if (original == null) return null;
-            
+
             if (cloneMap == null) cloneMap = new Dictionary<Object, Object>();
-            
+
             if (cloneMap.ContainsKey(original))
             {
                 return (T) cloneMap[original];
@@ -195,13 +197,14 @@ namespace net.fushizen.modular_avatar.core.editor
             var ctor = original.GetType().GetConstructor(Type.EmptyTypes);
             if (ctor == null || original is ScriptableObject)
             {
-                obj = Object.Instantiate(original);                
+                obj = Object.Instantiate(original);
             }
             else
             {
                 obj = (T) ctor.Invoke(Array.Empty<object>());
                 EditorUtility.CopySerialized(original, obj);
             }
+
             cloneMap[original] = obj;
 
             AssetDatabase.AddObjectToAsset(obj, _combined);
diff --git a/Packages/net.fushizen.modular-avatar/Editor/AvatarProcessor.cs b/Packages/net.fushizen.modular-avatar/Editor/AvatarProcessor.cs
index 1a2f2d02..bd9e40cf 100644
--- a/Packages/net.fushizen.modular-avatar/Editor/AvatarProcessor.cs
+++ b/Packages/net.fushizen.modular-avatar/Editor/AvatarProcessor.cs
@@ -23,22 +23,24 @@
  */
 
 using System;
-using System.Reflection;
 using UnityEditor;
 using UnityEngine;
-using VRC.SDK3.Avatars.Components;
 using VRC.SDKBase.Editor.BuildPipeline;
 
 namespace net.fushizen.modular_avatar.core.editor
 {
     [InitializeOnLoad]
-    internal class AvatarProcessor : IVRCSDKPreprocessAvatarCallback, IVRCSDKPostprocessAvatarCallback
+    public class AvatarProcessor : IVRCSDKPreprocessAvatarCallback, IVRCSDKPostprocessAvatarCallback
     {
+        public delegate void AvatarProcessorCallback(GameObject obj);
+
+        public static event AvatarProcessorCallback AfterProcessing;
+
         static AvatarProcessor()
         {
             EditorApplication.playModeStateChanged += OnPlayModeStateChanged;
         }
-        
+
         private static void OnPlayModeStateChanged(PlayModeStateChange obj)
         {
             if (obj == PlayModeStateChange.EnteredEditMode)
@@ -48,7 +50,7 @@ namespace net.fushizen.modular_avatar.core.editor
         }
 
         public int callbackOrder => -9000;
-        
+
         public void OnPostprocessAvatar()
         {
             Util.DeleteTemporaryAssets();
@@ -77,11 +79,13 @@ namespace net.fushizen.modular_avatar.core.editor
             new RetargetMeshes().OnPreprocessAvatar(avatarGameObject);
             new BoneProxyProcessor().OnPreprocessAvatar(avatarGameObject);
             new MergeAnimatorProcessor().OnPreprocessAvatar(avatarGameObject);
-            
+
             foreach (var component in avatarGameObject.GetComponentsInChildren<AvatarTagComponent>(true))
             {
                 UnityEngine.Object.DestroyImmediate(component);
             }
+
+            AfterProcessing?.Invoke(avatarGameObject);
         }
     }
 }
\ No newline at end of file
diff --git a/Packages/net.fushizen.modular-avatar/Editor/Util.cs b/Packages/net.fushizen.modular-avatar/Editor/Util.cs
index ff6813f5..031e59ee 100644
--- a/Packages/net.fushizen.modular-avatar/Editor/Util.cs
+++ b/Packages/net.fushizen.modular-avatar/Editor/Util.cs
@@ -24,6 +24,7 @@
 
 using UnityEditor;
 using UnityEditor.Animations;
+using UnityEngine;
 using VRC.SDKBase.Editor.BuildPipeline;
 
 namespace net.fushizen.modular_avatar.core.editor
@@ -31,37 +32,46 @@ namespace net.fushizen.modular_avatar.core.editor
     internal class CleanupTempAssets : IVRCSDKPostprocessAvatarCallback
     {
         public int callbackOrder => 99999;
+
         public void OnPostprocessAvatar()
         {
             Util.DeleteTemporaryAssets();
         }
     }
-    
+
     [InitializeOnLoad]
     public static class Util
     {
-        internal const string generatedAssetsSubdirectory = "999_Modular_Avatar_Generated";
-        internal const string generatedAssetsPath = "Assets/" + generatedAssetsSubdirectory;
+        private const string generatedAssetsSubdirectory = "999_Modular_Avatar_Generated";
+        private const string generatedAssetsPath = "Assets/" + generatedAssetsSubdirectory;
 
         static Util()
         {
             RuntimeUtil.delayCall = (cb) => EditorApplication.delayCall += cb.Invoke;
         }
 
-        static internal AnimatorController CreateContainer()
+        public static AnimatorController CreateAnimator(AnimatorController toClone = null)
         {
-            var container = new AnimatorController();
-            AssetDatabase.CreateAsset(container, GenerateAssetPath());
+            AnimatorController controller;
+            if (toClone != null)
+            {
+                controller = Object.Instantiate(toClone);
+            }
+            else
+            {
+                controller = new AnimatorController();
+            }
+            AssetDatabase.CreateAsset(controller, GenerateAssetPath());
 
-            return container;
+            return controller;
         }
 
-        internal static string GenerateAssetPath()
+        public static string GenerateAssetPath()
         {
             return GetGeneratedAssetsFolder() + "/" + GUID.Generate() + ".asset";
         }
 
-        internal static string GetGeneratedAssetsFolder()
+        private static string GetGeneratedAssetsFolder()
         {
             if (!AssetDatabase.IsValidFolder(generatedAssetsPath))
             {
@@ -71,12 +81,12 @@ namespace net.fushizen.modular_avatar.core.editor
             return generatedAssetsPath;
         }
 
-        static internal void DeleteTemporaryAssets()
+        internal static void DeleteTemporaryAssets()
         {
             EditorApplication.delayCall += () =>
             {
                 AssetDatabase.SaveAssets();
-                
+
                 var subdir = generatedAssetsPath;
 
                 AssetDatabase.DeleteAsset(subdir);