very late but i hope it stop people from suffer.I have no idea how you even could animate through C0 (i think its literally impossible) robloxanimator works is that it gets C1 and removes C1 cframe - Pose.Cframe and this result will be a new Motor6D.C1 i made a plugin and post about it
Motor6D before apllying animation will be considered as offset
post
plugin
For real procedural generation you would need to do crazy math
Edit: oh so basically just :Inverse() would make C0 work