I was having a ton of problems with broken thread and skipped stitches. I really was about to call the shop up and argue that they had done something when they did maintenance on my machine, except it only happened with FMQ. I cleaned, and changed tension, changed threads, changed needles.....microtec, quilting, embroidery, big, little , changed brands of needles and quite by accident, I had stuck a universal needle back in, that I thought was probably used up and VOILA, problem solved. I am going to try the Superior topstitching needles after watching their needle education video, but for my Pfaff, it was as simple as using the Universal needle for FMQ. WHAT A RELIEF!