[tongzilla]

Homer:
"After a 13-B or 12-C Backstroke Shoulder Turn, the Right Shoulder moves toward Impact precisely on the preselected Downstroke Clubshaft Plane, estblishing and supporting the Power Package Delivery alignments."

If the downsing has plane shifts, which plane angle is the preselected Downstroke Clubshaft Plane?

Given that the shoulder is on the Turned Shoulder Plane at the end of the backstroke, no matter which shoulder turn is used, how can the rear shoulder move downplane at startdown, on anything but that plane?

Your preselected plane will be your Basic Plane Angle (10-6). So if you are shifting from the Turned Shoulder Plane to the Elbow Plane on the downstroke your hands and clubshaft should move towards that plane angle. Your Right Shoulder would never move onto the Elbow Plane because it's too shallow.

The rear shoulder can move on, above or below the established Turned Shuolder Plane (angle from ball to right shoulder at the top only, not during downstroke) during startdown.