Unfortunately I broke two needles, so I did change needles (not the way we quilters would like) but I thought the same thing you did, that it's either needle or bobbin case area. I had my hubby rebuild it several times thinking that we did it wrong. I'm going to call chuck in the morning, he will probably fix it over phone. I will keep you all posted . I'm sure once it's running smooth I will fall instantly in love, I'm still very fond of my new friend :)