I have the Blue clipped wing 48. It originally had a new os 40fp and was a great flying plane. I have to dial down the rudder throw to about 70% when I take off of pavement because it does get crazy and then I start digging in wing tips. I really dislike the pavement landings because of the springy landing gear and any cross wind causes me to dig in a tip. I ran a 11x3 and a 10x4 on the 40fp and both kept it at a nice flying speed with extra torque to get off the grass fast. I built flaps into mine that go from the inside of the ailerons to about 1 inch from the fuse. This is a must have mod! You can do this helicopter style take offs that were the plane is still parallel with the ground but just climbs amazingly fast. Great for SLOW receiver landings too (saved my butt a few times on dead sticks as well). I then put a thunder tiger 46pro in it. I have about 10 flights on it and can say that it is more aerobatic like a clipped wing should be but I miss the good gas milage the 40 gave me. I haven't fully adjusted yet and have run out of fuel twice. I run a 11x4 on the 46. The big problem with the cub is the landing gear. When the plane is properly balanced the tail is really light when on the wheels. So it loves to nose over (had the tail completely come over once too in thick grass). The other night I just the dremel and cut new slots for the landing gear about 1/4" in front of the original locations. Add a little lite ply to the inside of the fuse for the new mounting screws and the plane still looks proportional. The bonus is I can tell there is more weight resting on that tailwheel now and hopefully that will correct the problem. Haven't tried it out yet but will soon.