Thx! Headshots are working much better now. On the himan test, I set the polygon flag, and also added a hollow skycube, in case that was affecting my results, and I am still showing a hit point near the naval that returns a vertex at the end of the arm, and what appear to be a few other minor tweaks. I am not worried about one vertex... just thought you might wanty to check it out.

The model should be correct AFAIK - it is closed and the UV is really straight forward. I have the Max file if that helps at all.