I would love a feature to find the source rig and also derived rigs in the RM.
I don't load many rigs on my toaster, but I do often make changes to a rig then store it in my local library.
Trouble is I sometimes forget what I've got. It would be really useful to have a feature that when I selected a rig also listed the derived rigs in the local library or even throughout the database so I could quickly jump to or audition them.
Likewise a feature to show the source rig that a derived rig came from, so I can quickly go back and audition the original, do a little A/B see if my changes suck or not.