RE: Hangar 9 150 Size P-51
I put my air tank on top of the fuel tank, a BVM pressure gauge in the cockpit, and the air fill port up in the engine compartment next to my fueling port. The valve is in one of the retract servo wells in the wing and the servo for the valve is in the other retract servo well. The whole set up only requires one quick disconnect. I've been very pleased with the set up.