I seem to have this same problem with free motion quilting. Top stitches look great but bottom looks like it's all over the place. I haven't practiced enough I suppose, and feel discouraged to do this, even tho I want to sooo bad! Bernina has a new foot out now to help with this...unfortunately I don't have a bernina. sometimes I feel there is still too much space between my quilt and foot. It can be very frustrating!!!