I have the DP Extra (which I assume is much like the Edge) and have quite a few flights. The plane is at it's best when it's light and flown slow. Stick with larger dia. low pitch props , keep the speed down and thrust up. Does not need large engines. DP recommends a Moki 1.8 at the max. He knows what he speaks of. I personally think the Moki is a little heavy and would prefer a lighter engine. It flies VERY well but is designed for 3D (i.e. built Light(weak ( don't crash)),Larger control surfaces (i.e. flutter ( don't fly fast and use full power only when going vertical,(UP))) and uses smaller lighter engines ( if you must have gas get another plane). I have just purchased a YS 140 DZ which I expect will be perfect for it. The DP planes are the best, just be gentile. BTW if you don't know how to land, the landing gear will bend/break pretty easily, it's light also. If you can't tell, I think in this size range there is nothing to compare it to in a ARF.