Gave it a try, and it works great in an initial simple test--thanks!!! The values seem to change as directed--the Forearm Side-to-Side at -100 goes to 0, and the Shoulder goes to -100, etc. I will give it a "live fire exercise" tonight when I can get at the bvh files I want to fix and see how it goes.

It looks like the pose might look quite the same as the original in all cases after processing--I imagine that's probably a Poser thing--but even working like this is huge! Attached is the first frame of the animation with the wonky forearm and hand (left), and the pose after running your script (right), which looks a little different, but the end frame of this animation which is less extreme shows both arm/hand positions looking nearly identical.

Again, thanks so much! I'll let you know how the full test goes tonight.

--Tim

PS: thanks for the offer of help, too, Bob!