All

There are some great ideas here. Thanks!

I like the idea of grinding the jaws square. I am looking at making a tool post mount for my die grinder. Bearing seem to be pretty good and it should work but I will have to make sure the jaws are indexed or bad things will happen.

The other idea I like is to turn down the centering shoulder on the mounting plate then re set center, I am a bit worried the chuck will move as the only thing holding it is friction.

Thanks all