If the stationary head must be precisely centralized between the feet, and the hinge pin for the pivot center's rotation must be a vertical line drawn from the top of the stationary head to the ground, then the hinge pin line will simply be a vertical line drawn precisely between the feet with the pivot center located on that line at address.
That's why I think that most golfers (like Tiger Woods) do not have a pivot center in their swing.
Jeff.
Do you read at all? Or do you just write? Or do you just like to argue?
Have you even bothered to look at your own 'Big Three'?
Gary Player
Arnold Palmer
Jack Nicklaus
Assuming you may actually be interested in words other than your own, read my post #16 -- learn something -- and stop tilting at windmills.
Meanwhile . . .
Talk to The Hand.
P.S. I don't know about the rest of you guys, but I'm all of sudden missin' DG!