Dr. Dave I looked at his airplane when he had it for sale a couple years ago and can tell you he used a pony keg for his header tank. If you look in his photo album you will see it in a couple pictures. I am also currently dealing with fuel flow issues on my model 1 which still has the header mounted on the firewall. I will be redoing my fuel system IAW SB 29, but using a different tank because that one is not available to me. Mike