[purehitter]

O.B.,

The descriptive designations of Rotator and Thruster came directly from TPI's Dr. Greg Rose and his interaction with a handpicked team of TGM instructors in a day-long meeting last year. He told us TPI had made the distinction based solely on personal observation of the respective motions.

When we explained the TGM concept of Hitter versus Swinger, there was a collective "Aha!" from their assembled group. Their research had picked up on the two decidedly different Shaft stresses in the Downstroke -- radial versus longitudinal, i.e., back of the Shaft versus top of the Shaft -- but they had no idea what was causing the phenomenon.

I don't have access to any definitive information as to their stats on this subject. It was all new to them, and they had not yet done anything with it. We were told they would do additional work reconciling their ideas with ours and get back to us, but so far . . . nothing. And we've not pushed it.

What TPI does not want known is that the Thruster does not produce the same results or data on their 3-D machine as the rotator. Their buzz word of today is the kinetic chain and how to snap it better for more club head speed. The truth is a thruster on that 3-D machine would not produce the results they want to market their program so MUMS the word on thrusters.

I have done many tests with a k-vest and I know it is not their $100,000 3-D machine but it will show measurements that are consistent when measuring the kinetic chain. I also have a friend who has a 3-D CAD machine and I developed a working device that measures the down swing thrust and torque of a thruster on the handle of the club so I know of the mega power produced in thrusting.