Grimber, you got a PM from me.

Reading your last post again, it reminds me that I was trying something similar. The pics in my Tutorial. Do you remember the collection of heads? The whole collection is made from two meshs. From the second mesh I already had the whole model.
She and he are the same mesh:


(without the hair)



I wanted to make metamorphoses through spells easy and as an eyecandy. Metamorphing slowly while walking for example.