I used a fuel valve and located it on the fuselage behind the cowl. The valve is simpler than the fuel dots as long as you don't have any leaks. You wouldn't want to mess with plumbing any time you wanted to remove the cowl. Here's a picture of the full side of the plane. You can get a better idea of the fuel valve location and the cowl placement. You might like the polished landing gear. Field is fairly rough grass so no wheelpants.

Ross