I have been thinking about this statement-: "There can be a rotational center that runs through the COG, and this is what we're seeking. We're looking on the Z axis, as a center of rotation could be found on other axes. The Clubshaft cannot be a center of rotation, since there is nothing on the underside of the hosel to counterbalance the Clubhead."
You seem to be implying that golfer needs to find the center of rotation of the club's COG. However, I increasingly believe that such a situation would only be necessary if the golf swing mimicked the action of a grandfather clock - where there is a single fixed fulcrum point and where the pendumum swings in a vertical arc under the fulcrum point. However, a human golfer swings a golf club i) along an inclined plane and ii) he significantly opens the clubface in the backswing and closes it in the downswing and iii) there is no "fixed" single fulcrum point. It is the way the human body is constructed that allows a golfer to square the clubface without having to worry about a golf club having a "theoretical" axis of rotation going through the sweetspot.
I am not a good golfer but on a "good" day I can hit my five-iron about 165 yards towards a distant target and all my shots will land within 10 yards radius of the target. I regard that as being reasonably accurate. How do I achieve that level of accuracy considering that I never think of any axis of rotation going from the sweetspot-to-PP#3? I simply know that if I keep my clubshaft on-plane throughout the backswing and downswing, that I will create a rounded clubhead arc that is symmetrical to the ball-target line. I know that if my clubshaft is parallel to the ball-target line at the third parallel position, then I am on-plane.Then I only need to ensure that my left hand swivels passively into impact so that the back of the left hand faces the target at the time of ball-clubface separation. If I achieve those goals, the ball goes straight towards my target and the ball is constantly struck within 1/2" of the sweetspot. I never have to mentally think of an imaginary axis between PP#3 and the sweetspot. How would that help me?
I am not a good golfer but on a "good" day I can hit my five-iron about 165 yards towards a distant target and all my shots will land within 10 yards radius of the target.
I have no greater professional goal than to help people to a level in golf that they could not achieve on their own. That would include changing the first part of your sentence. I want you to be a great golfer. And, I'm sure my desire for you is no greater than your own.
But, 165 yards is between an 8 iron and 7 iron for me. My 5 iron goes 200 yards. Understand that I'm not trying to get into a pi$ contest with anyone. I'm just making a point about distance. Shorter hitters can hit the ball straighter at times. But, short and straight doesn't get it done from 7,200 yards.
We have three pieces to this puzzle:
Clubhead - Pressure
Clubface - Directional control
Clubshaft - Geometry/Plane
Because the distance seems short, direction is good, and you're telling me the Plane is good, I would be looking at the power leakage. In doing so, you'll find inter-relationships in the puzzle. Finding the causes and effects begin the peeling of the onion.
Any level of success is not necessarily directly correlated to form and function. You could be the most talented athlete that ever walked the planet. If you are, those are less than stellar numbers. If you have trouble dressing yourself, those are magnificent numbers. What's important is getting 100% of what you bring to the table.
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