I have a Queen Quilter 18, it's not yet a year old. I ran out of bobbin thread last night so I quit for the day. I just went up there this morning, put the new bobbin in, and completed about 4' of that row and it didn't break once! Hopefully it will straighten up and stitch right today. :) (knock on wood). I think there are only two more turns to do but I'm making some coffee first...