Brand new Pfaff cylinder machine and cannot use a heavier thread because the feed dog opening is so small.  At least the one that came with the machine is so small--you put a 24 needle and a 277 thread and it just jams up..  Does anyone know if pfaff offers this larger hole in a feed plate???  Really stuck--about ready to take a drill to it and enlarge the hole myself--last option of course.  Also in need of a supplier for Pfaff parts in general.  Thanks any help is greatly appreciated.