Loco, No unfortunately all my attempts in video taping it have failed as when I get someone to get the camera out they suck at video taping, ever since those attempts nobody has been willing to tape me. I use a 2 finger grip inside the horshoe.
3and0, they say it is good to have a little rotation on it and the reason people say that is because it changes seam orientation mid flight so the wake behind the ball will move however, if you throw it right you won't have to worry about it because you want it to be unpredictable, don't try to control what kind of spin you put on it, just throw it with as little spin as you can and it'll do all sorts of things.
Kaz, either your JUGS is wrong our the police radar gun my coach uses is wrong. But seriously Wyoming is one of the driest places in the United States in the summer. The only drier places in the U.S. are the Mohave Desert and Southern Utah. Kaz it's also possible that my knuck doesn't rotate as much as yours does as I've been throwing the knuck longer than you and mostly what I work on is my knuck. I also believe I've done more research on the knuck than you have.
Kelvin: Wakes moves (not spins) but moves a ton you just have to see it from the right angle to see the dance. You are close to the correct answer on why it moves. The air catches the seams and creates a large and uncontrollable wake of air behind the ball that literally wags the ball around as new air currents come through and as the ball flies through the air. Some scientists have predicted the movements of the knuckleball so fast that the human mind can't react in time thus a good dancer is almost impossible to hit on purpose, in fact some of the flutters are supposedly so fast that the human nervous system can't even pick up on them to see them.