IMHO this is the single most usefull python script I've ever used.

The original MIKI object has 115067 vertices, which makes her practically unuseable for me.
That's why I started creating my own LoRez variations of her, but as soon as the vertex count of the head is changed, all expression morphs are lost.

Thanks to your script I was now able to successfully transfer MIKI's expression morphs over to my reduced version and I now have a fully functional MIKI that weights only 28991 vertices !

I also successfuly transferred custom made body, face, and expression morphs from standard V3 over to V3RR.

Also started to create reduced resolution versions of all the other Unimesh characters using V3RR and M3RR as the base.

Initial conversion time was about 15min on my low-end machine starting with V3.

The only real "problem" I encountered so far is that with some expressions the teeth get distorted because some of their vertices are moved along with the lips.
But that is easily corrected in a modeller.

Maybe I can avoid this by making a "teeth gone" morph first for the figure that is converted.
Or maybe I keep the teeth a separate object and not part of the head mesh.

But other than that, the script worked perfectly for me in P5, even with my custom made LoRez MIKI.

SO THANK YOU VERY, VERY MUCH !