Great! Appreciate the input!
I have already started some work in *trying* to fix this. I've noticed that the original developer did include the skeleton tags for r_hand, l_hand, and so on. The problem seems to be the hierarchy of the skeleton elements seems to be off compared to any other JK models using the _humanoid animations. What I mean is that r_hand and l_hand exist, however, are archived incorrectly. I've checked with the tavion model and I *think* if I redo the hierarchy to better match _humanoid skeleton and fix the .skin files it *should* work.
I appreciate any follow up on my proposed solution as I am just a beginner when it comes to this sort of thing and am spitballing here.