This thread is getting a bit off topic, and my reply above didn't help matters. Questions unrelated to Book Errors should be asked and answered, but in other Forums. Let's stay on track.
Unfortunately, Homer Kelley can no longer answer our questions regarding the logic behind the move of Hinge Action from Zone #3 (the Hands Lane) in the first six editions to Zone #2 (the Arms Lane) in the 7th. However, his words live on in the recordings of his three Golf Stroke Engineering Master Classes conducted during 1981-1982. I have personally transcribed the direct quotes below to help us understand the rationale behind this radical shift.
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-- "Hinge action is the result of angular motion on an inclined plane."
-- "The hinge action is not a motion of the hands. It's a paddle[wheel] motion of the pivot and the arm swing, and it is the result of an angular motion...a circular motion...and it takes place on an inclined plane."
-- "Hinge action is not a wrist motion. It is an arm and pivot motion. The hand only is positioned [vertical to one of the three associated planes] and then takes on its arm and body rotating motion."
-- "The hinge action is not a hand motion, a hand action, or a hand anything except position. It is the position that has been set up to be vertical to one of the three basic planes."
-- "The thing is...the pivot and the arm motion produce the hinge action. It is not a hand motion except in the position in which you are maintaining it...vertical to an associated plane."
Sorry for this obvious ( to some) but after some glases of fine Rioja I have to ask:
They should be in Zone 2?
Salud
__________________
Golf is an impossible game with impossible tools - Winston Churchill