[Mathew]

I don't have 3D drawing tools, but it's not too difficult to visualize the motion.
Matthew, please make comments/corrections to my crude drawing. The red/yellow planes merge/unmerge, and rotate together throughout the swing, but always stay in the plane of the left wristock motion.

In the golfers model, there isn't any useful relation to the inclined plane because of the variance of motion in the left arm. I'm still waiting for that ah ha moment though.

Bagger

The plane of the left wristcock motion (same as acc no.3 plane) per the flying wedges is a left arm plane. The sweetspot stays in this plane. The left arm nor the left flying wedge sits flat on the inclined plane. It comes from above the inclined plane.

When the hand is not turned towards the plane (which I thought would make the relationships pretty clear...) and is anywhere else - the LCOG will lay on the inclined plane on the angle that accumulator 3 plane makes as it passes through it. The wristcock no of degrees can then be determined by the angle between that line of intersection just described and the angle it makes with relation to Jens plane.