[BerntR]

Whoa. I'm not questioning your academic or work success. But try to see this from my point of view.

That has been my general approach towards TGM since I started reading the book. I try to understand the book on it's own premises first. Most of the time it makes sense. I removed a part below that is hard to disagree with

The Alignment of the Clubface and Left Wrist, when the Left Wrist is Flat, creates the Left Arm Flying Wedge. If the Left Wrist Rotates, then the Clubface rotates. Simultaneously, keeping the Left Arm Wedge Intact. This is "Rhythm" (per TGM). And this can occur whether the Club is Uncocking or re-cocking. So, regardless of the very different clubhead and Hand Speed, they can rotate together, simultaneously, synchronized by the Flat Left Wrist.

Radial Alignment = Rhythm.

I just resized part of your response. The part that states that the Left Wrist and the Clubface rotates together is a given. It can't be otherwise unless you regrip the club during the downs stroke. The other part that you bring up is the Flat Left Wrist. The implications of what you're saying here is that that rhythm and Flat Left Wrist are the same. The Left Wrist condition is a good monitor and indicator of the state of the rhythm. And it is also an important alignment for maintaining rhythm. But it is not the same as rhythm.

The golf club is subject to two types of rotation in the stroke. Rotation around the lontitudinal sweet spot axis and (forearm rotation) and the rotary motion of the whole club on the inclined plane. THe rotary motion of the whole club have two components; The right arm swing and the club swing around the right hand.

When you've got good rhythm, there aren't any conflicts between the two (three) types of rotation. The finish swivel is prepared so that the Left Wrist doesn't bend until low point. And the application of lag pressure is high enough to resist the left wrist from breaking down during the release. There is a lot more than a flat left wrist that goes into this. And RPM difference between clubhead and hands is what creates the CF throwout, stalls the hands and makes it a true challenge to have good rhythm.