Couple of things i found: The area over the feeddogs has to be absolutely smooth. If there was any gap (for example between the plate and the bed) the quilt will catch and cause the stitches to go nuts. I think there are vinyl covers that you can buy for FMQ (there's a thread on the forum somewhere...)And interestingly enough although I did not quite go the route of Grann of 6, I did buy a mid arm BabyLock Quilters Pro. The difference between FMQ on that vs my Bernina was night and day.