I really feel for you for I had the same problem when I first got my 6600P. What they have done is not set the bobbin tension for FMQ and then they came out with another bobbin they wanted the customers to buy so they could FMQ. I did get the other bobbin and still had trouble. The people at the store I bought it from was absolutely no help. I have found that the pressure foot adjustment [on top of left handside of machine] needs to be up as far as you can make it go. I have heard some people with this machine say they adjust the bobbin tension. I am very reluctant to do this for it can be dificult forsome of us to get that tension then set back for regular sewing. Thi machine was advertised as a great quilting machine but I think for it to be great for quilting the tension should be easy to deal with. Since I have bought my Juki TL98 I use it for my FMQ and works very well. Sure hope you get it figured out for I know how frustrating it is to get those big loops and eyelashes.