Bought cool Pizazz at Toledo, with a OS-70 4 Stroke. Balanced it about 1/4 inch aft of where sheeting ends on wing, reduced the throws for 1 st flight. Advance throttle straight into the wind ( on asphalt of course ) , it tracts straight, gets going pretty good, I touch elevator and it snaps on its back and sliiiiiiiiiides to a stop on the canopy, wing tip, and my gorgeous os-70's head. After 5 hours in the shop, it's ready to recover the damaged areas, BUT, the valve cover, head, rocker arm adjustment screws, and the carb were all broken. Anyhow, anyone know correct balance point for the Pizazz, and just in case, I pulled All my recievers out and their going in to Futaba along with my 8uap for a check up!! After all, it couldn't have been MY fault, ................could it ?