OMG!!! I fixed my tension problem. I have a Queen Quilter18 long arm. The tension has been a huge problem for months. This is what I did. Take the bobbin out, leave it in the case & pull on the thread. Does it pull out easily? or does the bobbin come off your hand with the thread. It should "bob" like a yo-yo. Not too loose so it flows freely, and not to tight that it brings the whole bobbin with it when you pull on the thread. Once you get the bobbin set, then adjust the top tension to match. Mine was almost 3 full turns to tight. Now quilting will be fun again! I'm so excited.