Been digging at bit into ART here trying to re-rig my Advanced Skeleton setup onto the ART setup. I might try and map out all the orientation offsets for the joints and see about writing a script to auto convert and copy the weights. For now, just a couple requests for ART. It would be nice if you could choose the direction of the symmetry R > L, L > R. I’m sure there have been multiple requests, but working in y-up would be nice.