Hypothetical situation…no, actually it’s real…
I have a model that I’ve made changes to one side (the left arm), modifying the appearance a bit, and added a new set of vertices between to others. I did the copy/flip thingie, but then realized something - If I reassign all the weight groups, I lose the special adjustments that were made to make the elbow joint work correctly. I know this is a long shot, but is there any way to do this without manually having to re-do all the weights (and I don’t mean just assigning the weights, I mean the physical trial-and-error process of weightpainting and adjusting)?