Well, I have see Sean Tucker fly his Challenger first hand (this summer again at the Cleveland air show), and if you want your plane to fly like his full scale Pitts, your going to need at least 80cc for that 30+lbs. That 3.7ci just ain't gone-na get-er-done. Fly..........maybe, but not without a lot of dead weight up front for ballast, and you will be on the verge of disaster, with the look of a heli pilot on you face[], most of the time, IMO.

Having said all that, I for one, am looking forward to the construction pictures you will surely post. What a great subject to model in that size. Miles Reed (I enjoy being in the same club with him and watching him fly his 40% Weeks Solution all the time) built two last winter in Sean's colors in 40% scale, for Sean's sponcer. Awesome big bipe.