I am building my first kit. It is a piper cub j3 40 size. Anyway i'm using a pitts style muffler and the pressure hose for the fuel tank that is connected to the muffler will be behing the cowl. The fuel tank i have has an overflow hole in it that i could hook to some fitting on the bottom of the plane but i can't seem to find that kind of fitting. That is what i need your help for and help would be greatly appreciated. Thank You