Originally Posted by VOLLEY KING
So all dyanspot would have to do is say "our purpose is to reduce vibrations" and poof it's legal?
No! The fluid in the Dynaspot is free flowing; it travels all the way around the head of the racket and is designed to move toward the top of the head during your swing. In other words by design it "alter[s] the swing moment of inertia." The particles in the Pro Kennex are en-capsulized and designed not to move "in the direction of the longitudinal axis of the racket" and thus it does not "alter the swing moment of inertia." This design feature makes the Pro Kennex legal and the Dynaspot illegal.