Martin, although we never found an exact reason for the accident we did find out a few things, 1) The same event happened with Joe Souza using the same set of blades, I didn't know at the time the blades were the same ones until later. Joe was making a high speed pass and the machine broke left, pitched up and we thought the rudder broke(Jerrie saw this also). We wrote it off as some aerodynamic problem with the body/canopy arraingement( no proof of this, only an explaination that allowed us to fly again without worry). When the blades were checked after my accident, the skins were 20 thou instead of 32 thou (all other rotordyne blades we checked were 32 thou). We believe they flexed and pitched the nose up. Joe regained control, I didn't. I think the secondary problem that contributed to my accident was I was running a 7.5 degree nose down CG. Jerrie calls for a 10 to 13 degree but, it flew fine at 7.5 so I thought nothing of it. Well, it was fine until I had the drastic pitch up. Then because of the CG it would not recover. With no forward speed and wind resistence against the body, I could not get the nose to drop to regain flying speed. I heard later that during testing of the J4B Jerrie actually unbuckled his seat belt and leaned forward to get the nose to drop(probably why he recommends 10-13 degrees/not 7.5). I don't blame the machine for this incident. I probably would have recovered inspite of everything if I would have run proper CG. I don't think you will have any problem with your gyro-just enjoy it. The Barnett flys well and is easy to handle. GET LESSONS IT IS A GYRO NOT AN AIRPLANE AND IT FLYS LIKE A GYRO. YOU WILL NEED LESSONS OR YOU WILL DAMAGE THE MACHINE, YOURSELF OR BOTH. Happy landings-Bob