Originally Posted by Seisick

i used hpi 3.2mm x 5mm, being .2mm thicker helps to never get loose and ran the shoes with space even when new, just spaced them til they wont fit on the second gear housing and from then backed up 1/4 a turn on each set screw making sure the space on both is the same, works flawless, the transition from first to second gear is perfect constant and by the sound on the engine can be felt! that helps to never strips gears and life of the shoes, but i admit some drivers prefer the kick on the car when 2 speed engages!!!!