[Daryl]

Does the selected shoulder plane have a 'best friend' in terms of selected elbow position?

There are “Plane Angles” and “Shoulder Turns” but not ‘Shoulder Planes’. I think that you’re trying to ask: “Is Elbow Location at Impact related to Swing Plane Angle?” The answer is “yes”, when using TGM procedures.

I'm working a rotated shoulder turn, which I believe is the TGM term for shoulders turning 90* to the spine, and correct me if I'm wrong, is the shoulder turn with the steepest pitch/plane.

Given this shoulder turn, is there a better or more efficient elbow position and would one be better for hitting versus swinging?

The Rotated Shoulder Turn is acquired and controlled by adjusting Pivot components. Turning the Shoulders at 90 degrees to the spine is giving preference to the Pivot to direct, rather than the Hands and Flying Wedges to direct, the Clubhead along the Delivery Line.

With Pivot Controlled Strokes, the Body adjusts its positions to rotate the center of gravity of an orbiting mass (Clubhead) on a path that allows the Clubhead to collide with the Ball. The "natural" Swing Plane for Pivot controlled Full Strokes is the Elbow Plane. Therefore, your Elbow, when using a Rotated Shoulder Turn, will most likely (but not necessarily) be located somewhere along a line that passes through the Ball and the point on your body where your Right Elbow touches your side. With Pivot Controlled Strokes, it is common to have the Right Forearm off-Plane and the Clubshaft to be On-Plane during Impact. Or, consider a "Left Arm Only" swinger, who adjusts and exaggerates his pivot components to drag the Clubhead on a path which intersects the Ball.

TGM uses the Right Shoulder and/or the Structure of a Power Package, so that when the #3 Pressure Point traces the Plane-Line, the Right Elbow is directed (automatically) On-Plane during the Stroke (Back and Down) and thus, the Right Forearm will be On-Plane during the Impact Interval and before and after as much as possible.

This Procedure allows the Golfer to Control the Golf Club on varying Plane Angles and still control all three paths of the Clubhead for a three dimensional Impact. This procedure requires the Pivot to comply with the Path of the Hands.

If you don't like the TGM Procedure, then the direction and path of the Right Elbow must be controlled by some other means if the Golfer wants an On-Plane Right Forearm during the Impact Interval. 99% of all Golfers use Pivot Controlled Swings. Some have On-Plane Right Forearms at Impact because they swing their Right Forearm and Golf Club on the Elbow Plane, and some don’t. Still, it’s only part of the whole story.

Using a Turned Shoulder Plane will cause your Right Elbow to move to a specific Location and cause an Automatic “Snap Release” of the Accumulators once you have an On-Plane Right Shoulder during Start-Down and Power Package to transport the Right Elbow and Accumulators. The swing becomes almost entirely Automatic. Just remember to breathe.