RE: Help needed to identify a plane (identified as Joe Wagner's Osprey)
Gene, a number of enterprising individuals have done this and have often gone unnoticed for their efforts with the Cox engines for example.
Actually the primary tank is bypassed entirely by drilling a hole in the tank and slipping the secondary fuel line onto the fuel nipple inside the backplate. The picture below is a Pee Wee .020 Now you can use a tank much larger!
Robert