I agree that I was demonstrating angled hinging. To demonstrate horizontal hinging, I would merely have had to increase the degree of instantaneous clubshaft rotation per unit time while the clubshaft remained on the inclined board.
You didn't comment on the fact that under 10-10-C/D, Homer stated that the clubshaft remains on the inclined plane.
I have read 2-F, and I have stated many times in this thread that I have no problem understanding the concept of PP#3 tracing the sweetspot's SPL - because it is the sweetspot that hits the ball and not the hosel. The hosel has to be inside the baseline of the sweetspot's inclined plane at impact. In that sense, one could argue that the hosel leaves the sweetspot's arc of rotation at the third parallel and returns to it at the fourth parallel. I can easily understand those points.
The actual difference in the arc of rotation of the hosel and sweetspot is very small.
Here is a composite photo showing the arc of rotation of the hosel and sweetspot in Anthony Kim's swing.
See -
The red arc delineates the sweetspot arc. The blue arc delineates the hosel arc. They are very close together. The yellow line was drawn by the TV commentator and it represents the clubshaft angle in mid-downswing. Note how it goes through the clubshaft at impact. In other words, in a general sense, the clubshaft is still on-plane at impact - although it is obvious that the only "real" plane of relevance is the sweetspot plane because it is the only plane that is precisely located on the ball-target line. The base of the hosel's inclined plane must theoretically be slightly inside the ball-target line at impact.
I still think that the mental idea of the hosel rotating around the sweetspot has no real relevance because the clubshaft never rotates about its own longitudinal axis to a significant degree at any instantaneous moment in time. The clubshaft rotates very slowly in space throughout the downswing/followthrough and it therefore causes the hosel's arc of rotation to be different to the sweetspot's arc of rotation.
I like Homer's statement when he states-: "Except for Impact, the clubshaft is an acceptable Visual Equivalent for both planes, especially if the Clubface is Turned "On Plane"."
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