Dave,
The 1/8 th inch was way to much. Can't get the engine to run decent. I borrowed a buddies throttle body from a new NC and the hole looked to be about 1/16th or slightly larger. I know it is larger then the hole that was in mine originally. Well time to order a new throtle body. By the way with my buddies throttle body my regulator is sitting flush, the motor idles and transistions great.