I changed the needle a couple of times. I even took a picture of the needle to look for a burr or a bend or whatever. NADA. I adjusted the bobbin tension looser and that seemed to help some too. But not enough. Something was making the bobbin tension tighter or the top tension looser. Then just before we had to go to Treadwell for the Stage Coach Run, I wondered about the top tension. The knob seemed to have a bit more "play" in it than the other machines in the shop (well the few that I checked....a couple of 201s, a 66, a 206, a 301) so I wondered if the spring was sprung. It did not look any different from another spring from a 201 but what the heck I switched it out. Then I put the tension back together and set it a bit tighter. It was hard comparing the lighter numbered dial to the black one...... but it looked like I had not turned the knob quite tight enough originally. I held the numbered dial against the spring and turned the knob tighter before I released the dial. I set it at 6 and the bobbin tension was fine. The top was a bit tight. I finally inched it down to 4 1/2 and it seemed ok by then . Even at top speed. So who knows what was really wrong? I did not take the bobbin case out again. It is a ROYAL PITA in the 201 though I am getting good at it. THANK YOU RAIN. The machine seems to sew just fine now. I will try it out again and see if it is holding true. But I think the Centennial has to go........I can only have one 201-2 in the house. ...... Now, folks I am off to the shop again. I bought a new toggle switch at the Hardware store today during my lunch break (yes I should have been doing charts, but a sewing machine addict has to do what she has to do) and I am dying to see if it will fit.