So far I haven't had a chance to get it the trac bar painted. With the holidays my work and life schedule has been nuts. However, I did get the heavier coils installed and that seems to have helped. I have had it out on a couple trails recently and tested it and haven't had any issues at slow speed. It seems to be a combination of things, first the rig is pretty heavy. (Steve didn't seem to think to many others that had his trac bar were running a heavily loaded setup.) Second, hitting an elongated speed bump at say 40 mph and coming down hard seems to deflect the axle backwards causing the contact. So the obvious solution there is don't do that... It did seem to improve with grinding the bar out in the diff area. When running a couple trails at 30-40 mph I wasn't able to duplicate the issue anywhere else.
I really don't want people thinking this is a common issue. I seem to be the only lucky one to have it.

I'm not sure I really answered your question but that's my update at the moment