You keep talking about budget and people keep sending you to O.S, Saito, TT and others. Why spend twice as much money when Magnum will do you just fine. As I mentioned, I have flown this airplane for year. It is abused, used as a glider launch platform and all of that with a Magnum 61 two stroke. Whoever says this airplane needs more power than that must have thrown a handful of rocks into theirs. Mine will go straight up until it is hardly visible. It will fly slow enough for training, and it is simply a ***** cat to fly. The only fault which was mentioned was the wire landing gear. Replace it with an aluminum gear and go fly. A Magnum 61 is available for $99 and the .46 is available for $79. They are no more difficult to tune and have no more problems than any other manufacturer. If budget is not a problem then buy whatever lights your fire. But having having been in this hobby longer than many members are old, I've owned just about everything on the planet. There is no need to spend money needlessly. Cheap or inexpensive does not mean "bad". Most of the problems with model airplane engines is inexperience. That is not the fault of the engine.