You will be happy with the Saito 56. It is pretty simple to run and adjust the valves the first time. After that you won't need to mess with it too often, if ever. I flew two strokes for many years and the Saito 56 was my first four stroke. Now I have six four strokes and other than the higher price I prefer four strokes. Well except for really fast planes, where only two strokes will do.