Just a stupid question .............. and maybe not appropriate to sweetpee's problems, but why do so many people have trouble the FW's and 301 bobbin cases? They are not that different. Class 15s have fingers that have to be placed in the right place, Kenmores have to be properly indexed, others as well. It's not rocket science.
Different machines face the needles different ways. No big deal. So why do the FW and 301s seem to be more problematic than others?
Just curious.