@WandW: The difference is that V4WM is the same default shape and pose as standard V4, while a custom shaped and posed M4 would not be the same as the default M4. So I think, at least in this case, that animated joint centers would be best suited and would be the easiest to implement. Clothing can be set to follow the joints, so there should be little need to use a 3rd party script to convert or transfer anything in most instances.