Feline, I like the idea of trying pre wound bobbins. My bobbins look tight and even, but I suppose it's impossible to really know while you are using them. I think I'll take my bobbin case to the dealer too so they can make sure it's not messed up somehow.
if I'd known I would have so many issues, I don't think I would have gotten a long arm, but it's too late to turn back now. Well, at least without losing a bunch of money by selling it.