[Martee]

The important thing is that the true Swing Center - for all components - is around a Hinge Pin with one end at the top of the Stationary Head and the other in the ground precisely between the Feet, with no regard for Body Location or Position at any time. These lines may be a duplication. If found eliminate one of them.

I wonder if the Hinge Pin is really meant to be vertical to the ground? Can at Impact Fix can you have a bit of tilt to the right at the top while still having bottom of the hinge pin precisely between the feet?

Clearly this hinge pin is not meant to be the blance point of the golfer in the golf stroke (if that was so, then weight would be equally distributed at impact).

A Hinge Pin is normally costructed such that its movement is at right angles to stationary post. If the right shoulder is driving down, might it not have to be tilted in order for it to be the most efficent?

These are intended to be just questions not trying to make an arguement one way or the other. Just trying to understand the application of the Hinge Pin.