J3General

Mine does that when I try to wind too fast. I just slow down to keep the thread spool from bouncing around so much . I do have a felt cushion under the spool pin on the bed and it still bounces if I'm winding too fast. In thinking about my reply, I may flip the spool over to see if that makes a difference and/or put a metal fender washer (large washer with a small hole) on top of the spool to see if that helps.

: I tried the washer idea, but the spool pin does not extend above a "standard" spool.

John Thomas in NC