Those that teach the book well get wonderful results. Students hit straight shots with compression. I have seen a number of instructors demonstrate hinging and its different ball flight characteristics. So I guess this is an area that science may not have a handle on yet. Aiming at the inside aft quadrant of the ball seems to work. Tracing the plane line works for me. For the average student it appears that TGM can be trusted as it stands to improve your game. The Trackman data can be very helpful and information gleaned from it. High speed cameras can and should be used by instructors to help their students. New knowledge in biomechanics can also be used to improve instruction. Remember the goal is to educate your hands with the correct feels to hit the ball better. TGM instruction and principles certainly can accomplish that. The three essentials are alive and well
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