I deleted my earlier post but I just have to say that while I'm sorry some of you have issues, I have a 6600 on which I FMQ both with the supplied red dot case and hopping FMQ foot and the blue dot case and adjustable foot with NEVER a problem!!! I use my machine up to 8 hours a day and it has never let me down. So I am guessing that you few are unfortunate enough to have been supplied with faulty machines OR it is operator error or you are using sub standard supplies. I am a bit fed up with reading that this is an inherent Janome fault, I and many others use their machines with no problems at all.