Lagster, could you describe in further detail the 'over and back'?
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David Lee calls this 2:1 Timing. Not everyone does it quite this way, but with the ones that do... the WEIGHT moves from the LEFT FOOT to the RIGHT FOOT, and back to the LEFT FOOT, before the HANDS, ARMS, AND UPPER TRUNK have finished their motion on the BACKSWING. This sets up what he calls... A "ROTARY WHIP-SLING, on the DOWNSWING. The LEFT HIP is now able to turn and "sling" the arms.
In TGMese... it is a procedure for LOADING the left FOOT, and setting up PIVOT LAG.
David Lee calls this 2:1 Timing. Not everyone does it quite this way, but with the ones that do... the WEIGHT moves from the LEFT FOOT to the RIGHT FOOT, and back to the LEFT FOOT, before the HANDS, ARMS, AND UPPER TRUNK have finished their motion on the BACKSWING. This sets up what he calls... A "ROTARY WHIP-SLING, on the DOWNSWING. The LEFT HIP is now able to turn and "sling" the arms.
In TGMese... it is a procedure for LOADING the left FOOT, and setting up PIVOT LAG.
Is this the same "Lee" (I forget the first name) who describes the "Gravity Golf" technique? If so, he describes a "counterfall" -- caused by a controlled unbalance at the End. I think the motion that 12 Piece Bucket was describing is best explained in chapter 4 of SLAP (Swing Like A Pro) called therein the "transition". It shows that in the interval from the position in the backswing where the arms are parallel to the ground and the shaft vertical, to the end, during that same interval, some of the player's weight is shifting to the left. Someone (Jack?) called it the "two-way stretch".
From SLAP "The challenge of learning to uncoil your lower body while the upper body is still rotating to the top of the backswing is an awesome one to most golfers. The concept of moving segments of your body in different directions simultaneously is difficult to grasp, let alone perform ..."