Originally Posted by
mattleegee
anyone have trouble when using the 31-34 pinion when useing lunsford motor bolts?
i tried a 75/31 and failed... maybe i need to try the 69 or 72 spur?
you have to use the button head motor screw to clear the really big pinions
http://www3.towerhobbies.com/cgi-bin...?&I=LXPA10&P=7