Binding a mecanim skeleton to a new mesh

Hi,

I am trying to add the skeleton to a new mesh in my scene. The original mesh contains the skeleton and the model moves according to the bone position and rotation. I now have a new mesh without a skeleton. I want to skin this new mesh to this existing skeleton. Below is my code where I copy the bone weights and add the skinned mesh renderer.

It doesn't work. It deforms my new mesh terribly. Just for background, my new mesh is just an x-scaled version of the old mesh without the skeleton attached.

  void Start () 
     {
         vertices = mesh.vertices;
 
         //Get original mesh bone weights
         weights=new BoneWeight[mesh.vertexCount];
         weights = mesh.boneWeights;
         
         // Get original mesh Renderer
         top = this.transform.Find("Tops").gameObject;
         SkinnedMeshRenderer meshRend = top.GetComponent<SkinnedMeshRenderer> ();
 
         //Get original mesh Skeleton
         Transform[] originalMeshBones;
         originalMeshBones = meshRend.bones;
         Matrix4x4[] bindPoses = mesh.bindposes;
         for(int i = 0; i < 16; i++){
             bindPoses[i] = originalMeshBones[i].worldToLocalMatrix * transform.localToWorldMatrix;
         }
 
         //Blend Mesh settings; tshirt is the blend mesh game object          
         tshirt.AddComponent<Animator>();
         tshirt.GetComponent<Animator> ().avatar = humanAvatar;//human avatar is the original mesh avatar
         tshirt.GetComponent<Animator> ().applyRootMotion = true;
 
 
         tshirt = tshirt.transform.Find ("Tops").gameObject;
 
                //add skinned mesh renderer component to the new(blend) mesh
         blendMeshRend = tshirt.AddComponent<SkinnedMeshRenderer> ();
         
                 //copy the bone weights and bind poses and bones
         BoneWeight[] blendMeshWeights=new BoneWeight[mesh.vertexCount];
         blendMesh.boneWeights = weights;
         Debug.Log ("vertex 2: " + blendMesh.boneWeights [2].weight2 + "vertex 100:" + blendMesh.boneWeights [100].weight0);
 
         blendMesh.bindposes = bindPoses;
         Debug.Log ("bind poses 0"+blendMesh.bindposes [7].m00);
         blendMeshRend.bones = originalMeshBones;
 
         //tshirt.transform.parent = this.transform;
         blendMeshRend.sharedMesh = blendMesh;
         blendMeshRend.rootBone = meshRend.rootBone;
     }