There are hand-cranks available that don't require a boss. There is one right now on the 'bay.
I understand that they come with a replacement stop motion knob which has a hole in it to accept the crank. I understand that they will not increase the number of stitches like the original Singer crank, one turn produces I believe three stitches, but I understand that they do work.
These do not need a boss, they fit right on the handwheel through the replacement knob.
The seller, who isn't me, makes them.
Last edited by 1.41; 01-26-2022 at 03:20 PM.