HB - you wrote-: "Circle path is a hand path. Endless belt is about #2. They are related but not the same thing."
I do not understand this point. I believe that circle path is left hand path, and that the endless belt is also left hand path. The clubshaft touches the endless belt at the position of the left hand which is fixedly attached to the endless belt, and during the straight line directional movement of the endless belt the left hand (which is fixedly attached to the endless belt) is moving in a straight line.
You wrote-: "Are you saying that there is no wrist cock with a circle path? Whatever the size of the pulley, if the left wrist cocks, there is a pulley."
I have no idea what you are describing. I do not think that the statement "if the left wrist cocks there is a pulley" makes sense. My understanding of the endless belt analogy is that the pulley has no necessary causal connection with the degree of left wrist cock. My idea of the pulley is the shape of the hand arc at the bottom of the swing.
So in this photo of Sergio Garcia's hand arc - the pulley section of the endless belt is the lower rounded part of the U-shaped hand arc where the radius is smallest (tightest curve).
Surely the pulley relates to the hand arc's tight curve at the bottom of the hand arc, and not the degree of left wrist cock that may/may not be present when the hands pass through that section of the hand delivery path.
You wrote-: "How can the club path in the downswing be more circular when the left wrist is cocked for a large portion of the downswing (shrinking the radius from shoulder to clubhead) while the left arm remains straight (maintaining the radius from shoulder to hand)?"
Why not?
Here is the visual evidence?
In this strobe photograph of Bobby Jones swing, isn't the clubhead arc as circular when the left wrist is cocked as it is when the left wrist becomes uncocked?
By the way, do you do not agree that many professional golfers have a 10-23-A or a 10-23-B hand path? Both those hand paths have a straight line portion (the only difference being that the angled line hand path requires a vertical drop of the hands down to the elbow plane before the hands move along its straight line path section).
Also, in Yoda's Alignment Golf DVD -disc 2 - he shows how to perform a straight line thrust action down towards the ground (down towards an aiming point on the ground). Do you think that his straight line thrust action is compatible with a perfectly circular hand path? What is the purpose of teaching that action - if not to produce a 10-23-A type hand delivery path?
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