A Super Tiger needle valve body is bigger than a stock Fox, and chokes down your venturi. The Fox .35 Stunt venturi doesn't have much meat on the walls to allow much drilling out, almost none. If the hole in the needle valve body is centered properly or at least close, you can turn down the center portion a bit carefully in a drill press or hand drill an using a needle file. Or, I have just filed flat spots on each side of the valve body, just don't go into where it seats in the wall of the venturi. Choking down the venturi just cuts your power a bit, but will also make your fuel mileage go up. You can just fly it as it is and see how it runs and responds. If you have an extra stock muffler, you may want to expereiment with cutting off the stinger tube to open up the exhaust a bit. Since you are restricting the intake a bit, it will help to open the exhaust and let it breath out easier.
Type at you later,
Dan McEntee