I have one, now about 7 years old, and it started out with a 1.2 4 cycle but now sports a 72cc Quadra. I have also greatly enlarged the rudder and ailerons. Don't get me wrong, building it stock works great and is the recommended way to start out. Built to plan, it is a very easy to fly and nice performing plane. Do pay attention to the incidence angles on the wings, it is very important if you want a pleasant flyer. On mine, I have about 1.5 degrees less angle of attack on the upper wing than on the lower wing and it has about 3 degrees right thrust and about the same on downthrust. The smaller Phaeton is also a very nice flying plane. It was one of two bipes that I have built that required no elevator trim when you go inverted; i.e. do a half roll and fly hands off without changing altitude. The other one that does this is the smaller Lazy Ace with a 90 4 stroke on it.