Great, that seems to have worked for the IK. As for needing another offset to the hand, I just decided to work in reverse. Instead of having the child bone underneath the hand, and constraining it to the attach bone. I instead did it the other way around and put a fixed offset to it, by default. It’s easy that the distance is always the same.
So problem solved, I can’t find where to mark an answer as a solution though.
But if anyone in the future can figure out what’s causing the full body IK to respond in this way in this particular situation. Then I’d be happy to hear that! I’ll try to leave the demo set up on my drive for as long as possible so you can try it out.
