The original Playboy Senior was 80 inch span and could be built either cabin or pylon wing mount; the Playboy Junior was a 54 inch pylon type wing mount ca 1944. I have the Cleveland plans and a P&W semi-kit of the Junior which will be covered with lightweight gold Esaki silk I managed to hoard for some years now. It may get electric power. An oldtimer may be scaled up or down in size as long as it retains the construction and the outlines of the original, beefing up allowed. Jim