Well now I know I'm not alone. My bobbin thread slips out of a freshly filled bobbin when I'm FMQ. My cure has been to not put on quit as much thread for that. It also helps to use my lone original bobbin, not the repos. Hmm, my second 301 came with several original bobbins. I think I need to 'borrow' a few bobbins from ErinRose for AnnieRose. I don't have a problem when piecing, just FMQ.