I LOVED the bobbin winder on my Bernina 1130 but the machine just died. Wish I still had the bobbin winder on it as the one on my Pfaff 2170 is terrible. I have a sidewinder which is better, but not much, than the Pfaff. The older machines seem to do a better job (imho) than the newer ones at winding the bobbins. I let the bobbin start winding (on both the Pfaff and the sidewinder) then begin to put a bit of tension on by hand as I guide the thread more evenly onto the bobbin.