"Buster" was a rebuild of the pre-war "Chief Oshkosh", went on to win many more Goodyear/Continental Trophy races, and was retired after the 1954 Dansville, New York air races.It is now on display at the National Air and Space Museum in Washington, D.C.

Wittman built an entirely new "Bonzo" for the 1948 National Air Races, where he flew it, finishing third.