I had one with the one piece wing, big slow servos for flaps, Quadra 40 and the reduction. When I got it from a friend it had flown well but he didn't know how to tune a two cycle gas engine. The prop was turning about 2550rpms. I am a two stroke guy from dirt bike racing with my son and got it up to it's max which was around 2810 if I remember. I could get more but the prop lost efficiency at anything greater. Flew much better but with that system they fly scale, which for most is slow. It flew like a trainer and came in nice and slow even without flaps. I couldn't believe how easy it flew but also how it seemed to be almost lumbering in the sky as it's speed is very scale. With flaps down you do have to keep the nose down as it slows way down. That is the most I can remember. I think mine weighed 27# or so. Does that sound right?