I built the Mach 1 from the Midwest kit and from the MAN plans. No comparison - Midwest really "fiddled" with the design - as I recall the airfoil and fuse width were different from the original. Norm's original was better, much lighter, and flew better - beautiful airplane. Mine had 40+ coats of Aerogloss in five colors (sort of drifted toward my stunt beginnings), flew it in the '74 Nats in Lake Charles.