[Yoda]

But this centered arc which you call the Spine -- Tilts! -- during Start Down. Hence the Axis has Tilted even with the Stationary Head.

Does this fact change anything, if at all?

Yes, the Downstroke Axis Tilt (as initiated by the Hip Turn) does indeed change things.

Ideally, the Stationary Head Location, the Impact degree of Axis Tilt, the Left Shoulder-to-Ball Radius and the On Plane Right Shoulder are established in Section 2 of the Stroke, Impact Fix (7-8 ). The Adjusted Address -- Section 3 -- normally features the same Head location, but much less Tilt, a lower Left Shoulder and a higher Right Shoulder.

Unless the Impact Fix degree of Tilt is restored during the Downstroke, neither the Right Shoulder nor the Left can return to their assigned Impact locations.