I was reading through ART_jointMover.py and realized that what I was missing to get the hind leg working was the JointMover_hindLeg.mb, which I had missed when I downloaded file from DropBox.
Sorry for bugging you again, but what sort of functionality is missing from hind leg? Is it something that would block an animator in a production environment? I see it does the ik fk matching properly and works with the space switching tool, so I just wonder if the issues are big enough to not rely on this setup for our characters until your next update.
Thanks again for the support!