I'm happy and mad all at the same time right now....
I got the new bobbin case on Sat afternoon, ran 2 scrap jelly roll pieces through and it seemed fine. Sewed a bit yesterday and a bit today and guess what?!?!?! It didn't bounce all over!! It didn't rattle and make noises. After almost $275 in cleaning/repairs (the cleaning probably wasn't even really needed, he said it was very clean for a 7 year old machine that's never been professionally cleaned) and repairs again a few months later, and having the guy tell me it's user error, I came here upset that I sucked at sewing and that there was something wrong with how I sew and that my machine that couldn't be diagnosed/fixed. You wonderful people suggested the bobbin case, I posted this thread after reading another thread on here about bobbin case issues hoping you ladies could help me too!, and you did!! I could have saved all that money getting it repaired for him to not fix it at all and just come here, listen to you guys and spend only $35 and have it all fixed!
So thank you, thank you, thank you!!!