that was just an extreme situation i wrote to to get the point across and your not wasting your money, if you have to buy gears. their probably a lot cheaper than their metal counterparts. Theirs speed rings for less contact and friction and teflon washers with the lowest coeficient of friction known to man, and they dont have to be lubricated either. the gear and pinion if its adjusted right its the perfect solution, because you dont have to use any stoppers. in fact i think MB slot should send me a pair for testing seeing as i seem to be standing their corner in this debate. john