Joe, I assume this is your PTSD re: Bernina's having nylon gears. So far I haven't had any fail, but obviously they will because nylon is a petroleum based polymer and it will ultimately dry out, if I'm recalling Chem II correctly. Nothing is worse than Necchi plastic gears however. Yes, it is shocking that Bernina puts in plastic stuff... Pfaff however did not. Elna did.