It's like a teeter-totter. If you want the other end to go up, you don't just stick two dumbbells in your hands. You move as far away from the middle as possible. By increasing that dimension, we get more effect than any amount of weights we could put anywhere else. No amount of weight you move will affect ball flight as much as changing geometry.

I think there will come a day when people will purchase drivers by ball performance and not the hype or numbers written on the club. Driver true-loft performance is a synergy of factors. Only the ball flight can tell you the true dynamic loft -- and that is a mixed function of measured loft, face angle, center of gravity, moment of inertia top to bottom and face roll.

It's like making figures out of balloons. You can fill a balloon with air and shape it to be a pretzel, a donut or a hot dog. Each will have a different moment of inertia and a different center of gravity. By changing the shape of the balloon, you change the physical properties of the balloon.