There’s nothing I can do about how animations and VRC apply to the skeleton on the model. I had to turn the model into a T-pose (which is a game rip model, so it’s entirely accurate to BL). In BL, the arms only rotate on a single axis. You have to have a humanoid rig in order for it to work in VRC, so the pivot points that situate the arms are the absolute best I could fit them. I could invest a million more hours into this but I really don’t want to.