I don't know too much about carbs, but i was wondering, if you were to open up the throttle barrel part would that not allow more air to flow past the venturi allowing more fuel to come in?? therefore increasing the rpm?. Basically i have an OS .40 LA that i experiment with, and if you look into the carb, and open the throttle barrel all the way, the throttle barrel hole is smaller than the carb opening, by about i would say .3 of a mm, that adds up to a decent amount of area, so if i was to pull the throttle barrel out and drill a hole to the size of the carb hole would that increae performance?