I was playing with golf swing mocap data, and I followed this tutorial,
https://www.youtube.com/watch?v=Eha1cLjALcE but it absolutely does not work for a golf motion. The IK is broken at the wrists with reach targeting. I got the grip to be more or less good enough, but there is no possible way to do a golf swing because the wrists are impossible to put in the right place once you use a reach target.
It would work perfectly if you could attach each hand to the same object. Does anyone know of a work around? I tried daisy chaining dummies, but I get the error message that something cannot attach to itself.

Close enough for now. A good test would be interlocking fingers.

Off balance, but wrists are normal.

If addressing ball, then it's broken. No way around it. I also tried gripping in this setup, but then it just breaks elsewhere. It's limitation of the reach target. The IK is pretty good for hip and body rotation. The wrists are just FUBAR.
The iClone house tutorials always depict the program in the best light. The situations where iClone struggles are never chosen. :-)