As much as i tried i could never get my Sig S.E. to waterfall. One day i decided to work on flat spins and the such and temporarily mounted a few ounces of lead to the tail making it very tail heavy. It did help with flat spins but i still could not get it to waterfall. It would just loop. This is with as much throw as i could get on the elevator. If your thinking of getting a Sig S.E. i think you should. Even though this one trick is not in its inventory,you will still love the way it flies. I sure loved mine.