I am so frustrated with my Singer Inspiration 4220!!! Every time I try to sew on this thing the bobbin case moves around and the thread ends up jamming. Then I fix it and I am able to sew for a few minutes and then it happens all over again!! I have been messing with this machine for a great part of the day. I have hardly quilted anything! I was so frustrated my husband finally came over and put the bobbin case back in for me. Has anyone ever had this problem? I've only had this machine for a couple of years and quilt whenever time permits. My husband bought it for me as a starter sewing machine because he wasn't sure just how much quilting I would do. :-)