I just got my 60 size Edge 540 int0 the air. It's very stunt worthy, but not very stall worthy. You can do what you want with aileron throws but keep the elevator throw where they say as it is easy to go into a high speed stall. You need to land fast also, I guess this is because of the wing configuration. I have an O.S. FX 91 in mine and it has awesome power for vertical climbs and hovers at about half throttle. the engine fits completely in the cowl and looks beautiful on the ground as well as in the air.