My cub was the arf and I put a OS 70 surpass on it. Absolutley a blast to fly. Takeoffs took a little getting used to. Never groundlooped or anything just fairly difficult keeping the plane straight until proper speed is established. My advice is to put a bigger 4 stroke on it and you will not believe the difference. Now that I have numerous flights under my belt with this plane, the easiest way to get it up is to gun it and 10 feet later you are airborne. Keep in mind the engine i have pulling it. In a tailslide I can pull it back over without any problems. I caught some flack at my field when I bought this plane. Now 3 of the others have gotten one. The slow low passes are AWESOME!!!!Good luck..