[6bmike]

I do understand that technically the spine is not a bottle rocket and that it has curves in it. Because the spine sits in the back of the body, the vague generalization of it being a bottle rocket is somewhat acceptable to me. The spine does not go through the center of the body like a rotisserie chicken.

but my main point is if people here agree with the compound pivot being pretty much the same as the pivot preffered here, how can I prevent swaying action?

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The compound pivot the way Austin says he does it is to stabilize the top at the Cf vertebrate and slide the hips like a pendulum from that top point. Slide then turn, slide then turn. The only problem is when you watch him swing; his first move is a turn- either as a pre-set of the hips at address or a small pre-set as he starts the club back. His hips move 45 degrees to the target line- not parallel. More of a turn, slide, slide, and turn.
When Austin said a turn makes you sway the head, he saw the shoulders move with the hips and place them over the right leg, swaying the head. NEVER turn the shoulders with the hips. The hips are independent from the shoulders, 7-14, the Hula Hula action. When you view the pivot with attached shoulders and hips the slide slide and turn action of Austin solves that problem. So if you sway, train this independent action.

But Homer in 10-14 and 10-15 has several ways to move the hips, so I don’t think everyone would agree that the compound pivot is just the general way to move them. The Austin pivot is I think is a free-wheeling 10-14-A and 10-15-A with a pre-turned hip at address, maybe closed to the plane line at address. Many like to use a delayed hip action that turns or slides and turns as they follow the shoulders then lead and power the down stroke. 10-14-B, and 10-15- B.

The spine- yes it is curved and because it is, moves in 3 dimensions during the pivot- adjusting and re-adjusting with the motion. The head stays centered between the legs not the spine. The spine is not a stick that allows the body to rotate symmetrically. If it did the head could never stay stationary- it would sway of the ball with any axis tilt.