A nose heavy plane snaps easily. A real good starting balance point for the 300S is 3-1/2" aft of the leading edge at the tips. The tail doesn't have to work too hard to keep things in shape there. Another factor is the speed at which the plane is pulled up at. Too slow and over it will go. I've seen too many people fly the larger planes like smaller glow aircraft and they have been dissapointed when the performance/reaction wasn't the same as with the smaller plane. Bigger flys differently, and you have to learn and adjust to the differences. As the planes become larger, the flight habits get closer and closer to full scale as the size increases. High power outputs negate this to some extent, but aerodynamics can only be "bent" so much.

Pat