I have a Magnum .90 four stroke on mine and it will usually fly at 1/3 throttle. I also added a more scale fuselage behind the cockpit by building the frame I wanted, sheeting the frame as the instructions call for then cut the skin away from the open areas. On a good bright day you can see through the covering. It doesn't need a steerable tail skid. It really is too far off scale to waste much time trying to make it more scale. Just make it look good and go fly.