I'm in the process of putting in my fuel tank and lines in my Super Steraman. I have a G26 in it and was wondering if I should go with a three line hook up, or a two line hook up. I would think three line with one being the fill line (fuel dot) , one to the carb and the other a vent out the bottom of the plane, right? I do have a T-fitting for a two line hook up, but I was thinking if I was to fill the fuel tank through the fuel dot with the line off the T-fitting going to the tank and the other to the carb, what's to keep the fuel from flowing out the carb when you try to fill the tank?