I worked on a S T & S at church this week. I had a terrible time getting the bobbin out. Is there a trick to that little black thingy? Finally got it out, cleaned and back in. The machine would sew a few stitches then start skipping. Any ideas? My repairman says to clean the tension (I didn't). Or is it time to turn the Touch & Sew into a Touch & Throw? I wouldn't care except both other machines available there are ZZ machines and I prefer to quilt on a straight stitch, which this one is. If that one will sew, I wouldn't need to take my 301.