[Daryl]

Daryl, how can zone 3 (hands) really rotate independently? Isn't it zone 2(arms)?Unless I'm missing something I consider the rolling of the hands and wrist a function of the arms whereas bending and cocking is a function of the hands.
Guess this is how one consider wrist function a product of arms or hands.

That's true. I could be wrong. I struggle with that too. It sometimes seems nothing more than a Pitched Elbow on the Backswing. A not so simple Rotation of the Flying Wedges.

With a perfect 10-2-B Grip, Extensor Action Right Forearm Takeaway, Flat Left Wrist, Bent Right Wrist, Primary Lever Left Arm Wedge, etc., it takes my maximum Rotation to Swivel that Clubface (Sweetspot Plane) onto the Swing Plane.

Most Golfers will use a Slightly Bent Left Wrist during the Backstroke and at the Top and Downswing to mimic the Swivel by bypassing the Flying Wedge Rotation.

Homer Kelly said

There is, however, the “Release Roll” (Swivel) which is a true rotation of the Hands into Impact alignments by Accumulator #3 with (10-18-A only).

So, if the Hands are Rotated by Acum. #3, is that a Flying Wedge Rotation or Hand Manipulation?