I purchased a used GMQ frame a few weeks ago. Does anyone else have an issue with the tracking system? This one was set up but not used for quite awhile and the tracks and rollers were full of dust. I was hoping after I cleaned them it would move smoother. When I do free motion it works great but trying to do a pantograph or follow a pattern the carriage does not move like I would like it to. The Grace company does sell upgraded carriage and track systems. Has anyone upgraded their tracking system and are you pleased with it? Any suggestions would be helpful.