Heya, great work on this one! I'm very close to getting this set up with my avatar but I am having trouble with the blend shapes for the bridle such that it moves with my avatar's mouth. Did you happen to catalog any info that would help with that?
Ah I think I have found a workaround. I can join the meshes of the bridle and the body to have it be one mesh with one set of shape keys. It does mean that I can't animate the rendering of the mesh for toggles/etc. but that's fine for me in this case. Thanks!