[Yoda]

I've read both Ernie Els and Nick Faldo say the left shoulder is the primary driver of their downswing. I'm sure they've said and felt other things at times, but Faldo is in his book and Els is in a Golf Digest article.

In my post you've quoted, I said that, in practice and drill, the player should be aware of the return of the Left Shoulder to its Impact Fix Location. In fact, establishing the Stroke's Radius and the precision Left Shoulder-to-Ball Location is the primary purpose of the Address Routine of 2-J-1. If the Feel of that return assists the player in his Expanded Translation (of precision Mechanics to Feel per 3-E) -- that is, if it becomes a "key factor" in producing a "simplified Feel" of his Total Motion -- then, by all means, he should use it. But...

Regardless of Feel, it is the Start-Down Thrust of the Lagging Right Shoulder -- the "fastest and farthest moving component of the Pivot" that "actually transmits the Pivot motion to the Arms" (7-13). It is the Lagging Right Shoulder that reconciles both Pivot and Power Package by "moving with great precision of thrust, speed, direction and distance (2-H). It is the Lagging Right Shoulder that is "thrown" by the Hip Action (7-15) and thus "supplies the initial acceleration of the Downstroke" and the drive of the Left Arm and Club toward Impact. This is the very basic #4 Power Accumulator of 6-B-4-0/A/B/C.

And its Maximum Power and Maximum Trigger Delay are produced by using the Hip Action (7-15) of either the Standard or Delayed Pivot. This Action increases the Right Shoulder Turn's Pivot Lag, thus enabling its Maximum Thrust against Pressure Point #4 (where the Left Arm contacts the side of the Chest).

It is this last #4 Pressure Point that the good player Feels as he unwinds into the Ball. You mention Nick Faldo. Just recently he was featured on The Golf Channel in their program Playing Lessons With the Pros. I heard him repeatedly talk of "turning his chest" through the Ball. Now, whether he felt he was actuating this Rotation (Body Power per 2-M-4) with his Left Shoulder or his Right -- or with his Feet or his Knees or his Hips -- matters little...as long as that Rotation is accomplished. But the last thing to move in that Pivot Train (6-M-1) is the Right Shoulder, and that is what is producing the Pressure he is 'Feeling' when its 'from behind' Thrust welds his Left Arm against his Chest.

So, it is this #4 Pressure Point (10-11-0-4) that constitutes the Active Direct Drive of the Left Arm and Club, and it is Loaded by the Right Shoulder Turn's Thrust -- not the Left's -- per 6-B-4 and 7-19-3. In fact, in earlier editions, Homer Kelley specifically advised players seeking Maximum Power and Trigger Delay (of the #4 Accumulator) to "discourage any tendency toward an Arm Swing by either inactivating the muscles of the Left Shoulder or by temporarily overpowering them with the Thrust of the [right] Shoulder Turn." [Bold emphasis added.]

Now, Matt, you have stated that both Faldo (in his book) and Els (in a Golf Digest article) "say the left shoulder is the primary driver of their downswing." I am always interested in what the great players Feel in their Golf Strokes, and I would very much appreciate it if you would supply those specific references.