Don't have any suggestions for your jamming problem, but wanted to add that when I had my Bailey, it preferred a tight quilt sandwich. No way could I grab my finger. When I went to the HQ, it likes the quilt like Prism says, and I had to re-learn how to put a quilt on the frame. I never had problems with the Bailey, but when through months of problems with the HQ because it liked things so different than what I'd learned to do with the Bailey.
The Bailey is a stretched domestic machine, so it does not work like a true long arm, and a lot of things with it are quite different. I really liked mine, but got tired of dealing with adjusting the back bar every time I rolled the quilt. I love having a higher machine with a dead bar in at the back. Well, I love it now after I figured out to make everything work together.