Man, I've never used 14 on my avistar and I have a TT 46 pro and fly the bageezes out of it. Inverted loops, flipa-majigz, and more. I usually use 8 or 10. The reason you even use rubber bands is so the wing can move(or even come off the plane) if you were to have a hard landing or smack the wing into something. You might as well epoxy the durn thing on there if you are going to put 16 rubber bands on it. I'm surprised it doesn't break the wing in half!