I guess I should have said it isn't as easy to do a "drop test" on a 401. I'd prefer not to take a horizontal bobbin case out just to do a "drop test" especially if it had been sewing. I'd check threading first.
Janey - Neat people never make the exciting discoveries I do.
Last edited by OurWorkbench; 10-27-2018 at 04:27 PM.