There's another broad brush generalization which IMHO is fallacious, TallPaul. For years the full-scale Pitts has deserved its reputation as a squirrel, a treacherous flyer. In the last five or six years, and in my personal experience with the Cermark, and then the GP Pitts, the designers have done their homework and these airplanes fly just as well, if not better than most of the sport monoplanes on the market; that is, of course, unless you choose to load a couple of extra pounds of engine on the nose, increasing the sink rate and stall speed and pucker factor. I wouldn't mess with the thickness of the airfoil. But then again, that's just me...JIM