Steve,
The motor needs to be rewired, so I've been turning it by hand without the hand wheel on it for the most part. You can really feel it when it binds up. But even with it in the binding position I can't "see" what's doing it. Either somethings bent or it's just not obvious.
As an experiment I put a motor on it last night and it sews a great stitch. Timing is good, tensions are good. But the problem gets worse as the speed increases.
I'm going to work on it a bit more, then if I can't figure it out with help from the board members, I'll cart it over to my LSMG and ask his help. He's been helpful before so I'm hoping he will be again. I could always offer him some wampum for his time.
Joe