Ive just started flying 3d with a 60 Razzel. Cant get the darn thing to hover but learned to do some decent KE spins today. the aileron was definetly the key to keeping knife edge going. Didn't discover that on purpose but keep noting how the nose would change attitude by moving the aileron back and forth while trying to do consecutive waterfalls. just kinda fell into the knife edge Too much aileron would definetly cause it to fall out of knife edge once it started.