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Bernt
I can understand why you would envision the need for what you call a "three lever" system to represent a body-driven/pivot-driven golf swing where the third lever can be conceived to be a "lever" between the central torque generator and the left arm at the left shoulder socket hinge point. However, whether you mentally envision a three-lever system (equivalent to a body-generated/pivot-driven dowswing action), or a two-lever system (equivalent to a pure arm swinger - ala Leslie King's or Peter Croker's teaching philospophy), the basic physics of the release phenomenon is going to be the same - dependent on the direction of movement/speed of movement of the most peripheral hinge point (at the hands) during the downswing as it relates to the COG of the club. The clubshaft has no idea what is driving the hands to move in a certain direction at a certain speed, and it only responds to the direction/speed of the pulling force at the most peripheral hinge point - a hinge point between the left arm (at the left hand) and the clubshaft. The clubshaft is unaware if there is another hinge point in the golfer's swing system - a central hinge point that must exist in a three lever system.
Jeff.
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