I got to fly mine today as we finally had a weather break. I also had to place the battery up front with the reciever. I have an O.S. 70 Ultimate in mine. Pulls vertical at a high rate flys mostly at half throttle. What a rock solid bird, I tried a high test approach the first flight and basicly got it to stall, it did not fall off one wing or the other just strait ahead. This plane is very predictable to fly and rock steady, what a joy. total weight on my bird is 6 lbs. 6oz. All I can say is.......SWEET!!