[Jerry Clayton]

with the throttle plates completely closed, I take a .025 drill bit in a pin vise(a hand held tool for twisting a very small drill)thread it into the slot, hold the t plate against it and then pull the drill bit straight out of the slot, which will reverse broach the hole to a perfect .025.(I don't twist the drill as that will sometimes break the bit) When done, I have 4 perfect .025 openings at the t plate/transfer slot---this will then be round holes insted of the squares of the t slot/t plate----then the idle speed is set by the .10x hole in the center hole between all 4 t plates-------