I brought out the big guns. I used my tri-flow oil and grease and went through it end to end. I also figured out some things I had not fully understood when I tackled this before. I'm still not sure what moves the feed dogs. It did not make a noticeable difference. I adjusted the controller today. It helped. Between both, it helped. I'm still don't think it runs nearly as fast as my 301, though. I may buy an electronic controller. I need one anyway for the other 401.
Bkay