Bad Tooth:

Crazy is right on for most of us. Being less than a young buck I have to do a little more. Start off with good CG location fo 3D and then ballance the bird from side to side very well. Get it where it will stay right in the middle. Last, seal your control surface gaps. After flying 3D for several years now, I don't have to do all this, but I do it anyway for ease of flying. Takes a little time to learn to catch the rock, stop it and control the remainder of the drop, but will come in time. Practice practice practice. ENJOY