I am quilting using free motion on my DSM. No matter what I do, the stitches on the top of the quilt are not well defined. They sort of run into one another and don't look like stitches. The back of the quilt stitches look great! I have changed to a better quality thread (same thread in bobbin and on top), increased the tension, lowered the tension, changed needles, worked faster, slower, etc, etc. Any more hints out there? Thanks.