How far up from the bottom of the brake pedal do you have the u clamp mounted? I have to have mine so far down I hit it with my foot. Dont like it at all. If it is not down that far then I dont get full braking on the trailer. It seems to me the calibration on the potentiometer in the controller is calibrated for vacuum assist brakes and not my hydro-boost brakes (much LESS travel than vacuum assist). A picture of someones install that works right would be appreciated. TIA