Thanks. No smoke, and when I run it without the hand wheel the motor just runs great. There were some threads around the bobbin area and I think I got them all, plus quite a bit of lint under the throat plate. I may remove more of the bobbin assembly and have another look. I don't see any threads around the main shaft. But I think I will take more apart and do a better clean. I hope it isn't a part because my knowledge there is limited. An opportunity to learn!