Just got my Showtime 50 and I'll install a Satio 1.0 in it. Probably use like a 15x6 APC, so I'll get the best of pattern flyilng and be able to do some 3D stuff. 4 Strokes might take a little more work than a four stroke, but for flat out torque and power, its there right now, it takes a 2 cycle a bit to get going. Sort of like in pattern flying, 2 stroke planes tend to need to build up speed to get though a maneuver, verses a 4 stroke, where you're swinging a bigger prop and you have power quicker. Its all a preference, as everyone will have an opinion. I fly both kinds of engines but the 4 strokers when working right make flying funner and of course, they sound better too.