Yes, prewound bobbins are the berries. What brand is your L/A......did you have a few lessons with purchase. Has the dealer come to your place to actually " see" what you are having a problem with? Sometimes simple things like can cause major issues.....going to fast for stitches to properly connect...I really am sorry that you are so bitter about your investment.....did you try before you bought? I have been doing this for about 15 yrs., and even with my regiment of things I do regularly, occasionally a prob comes up that makes me scratch my head...but then I do the checklist again and somehow it corrects.......I wish you the best of luck.....