[12 piece bucket]

There was a film done by TGC with Jim McLean and Sam Snead. The video has a lot of footage of Sam Snead's swing. In the film Mr. Snead indicated that he allowed his head to swivel a little, but otherwise he kept the head steady.

I think that from some of the posts from Mr. Skywalker... we can see that in order to keep a centered HEAD in a golf stroke, the various portions of the SPINE(Cervical, Thoracic, Lumbar) are not staying straight like a ROD. Actually... if this is attempted, the HEAD WILL most likely MOVE during the stroke.

Agreed . . . According to 1-L the Stationary Post is at least in my estimation a imaginery line through the head and into the ground. The spine is the center of the shoulder turn and NOT the center of the stroke. The POST doesn't bob and sway meaning the TOP of the post (head) and bottom . . . point on the ground in the middle of the feet.