As I already mentioned, the CG on my Harrier is forward of the recommended envolope. I hate to just add dead weight, so I haven't tried to correct it yet. I may try a larger battery, at least I'll be getting something for the added weight. As it is right now, I have to pull full elevator just as I pull the throttle off. If I wait till the throttle is already off, it never really rotates to a sudden stop. I'm sure if the CG were further back it would rotate much better. If the timing is right, the walls are still quite good. Have you tried full down elevater with spoilerons and full throttle. Most of the time it will tumble once or twice, then spin on a wing tip a couple times, then repeat the process as long as you down elevator and full throttle. Every know and then, it will start spinning on a wing tip and hold that attitude. When it does, it doesn't lose any altitude, it just keep spinning on it's side. Cute as can be, now if I can just figure out the conbination to do it every time.