[Daryl]

It is my understanding that the wrist uncocks as the result of centrifugal force.. Hands are just clamps. No active uncocking of wrist at all. Or the wrist uncocks as the result of forearm thrust(Hitting). I seem to be forever adding a little wrist uncock to my procedure with mixed results or if I am not adding, I am controlling the rate of uncock which must be inhibiting my clubhead speed. Particularly on short shots where there is less CF. Here I can see the utility of using forearm thrust to power it thru. So if I am coming from the top(swinging) with a "karate chop" it is an arm motion powered by the pivot, pulling down with last three fingers(No 2 accum) but not actually uncocking the hand but waiting for the selected PA to uncock the wrist. So how many of you actually uncock your wrist using forearm muscles. Do you really either use forearm thrust or wait for CF to do it?

That's what the Book is all about. The following answer is insufficient.

Pulling the Left Hand away from the Right Shoulder during the Downstroke is synonymous with Release. If the Left Hand and Shoulder move Downplane simultaneously, the Clubhead will not fly out into its own orbit.

If you uncock with the Muscles of the Left Hand and/or Forearm, then you'll need to Force a Roll with the same procedure. That's disaster because as you Roll the Left Hand for Impact, now with the Clubhead moving so much faster than the Hands, it will, must, bend the Left Wrist. The last thing any G.O.L.F.'er wants to do, is physically roll that Left Wrist before Impact. (that does not include arching such as used in a non-automatic Release)

CF will Uncock and Rotate the Clubhead. In G.O.L.F., your Hands Swivel because the Clubhead Rotates around the center of gravity, not the other way around. In a true CF swing, CF will square the Clubface to the Center of Gravity of the Clubhead every time. It's up to you and Your Hinge to Roll the Clubface through Impact.

If Rolling is imparted by the Pivot, and Swiveling is caused by Clubhead rotation, then what do the hands do?

Swiveling is a Clubhead Rotation. It's about a 1/8 Rotation of the Clubhead around the Sweetspot Plane (10-2-B Grip). Roll is Clubface. Roll is Toe and Heel.