Elbow Plane Fog Clearing
 

Heat,

There is a major -- but common -- misconception surfacing here, and I will explain it using the first three photos you have have provided. [Photos Four and Five are out-of-sequence and should appear as Three and Four. Photo Three should be the final Photo Five.]

Regardless of the Plane Angle used, the Right Elbow -- and therefore the Right Forearm -- are On Plane only during the Release Interval. Almost immediately in Start Up, the Right Elbow (and with it, the Right Forearm) leaves the Plane. This is true even when the Stroke is on a Zero Shift Elbow Plane. It is the Hands and the Sweet Spot that adhere to the selected Plane, not the Right Elbow. In other words, though the Right Elbow's Impact Location is the reference point that establishes the initial Plane Angle, the Right Elbow does not adhere to it.

In the Backstroke demonstrated in the first three photos, a Plane Shift does indeed occur. The Club begins its journey (to the Top) on the Elbow Plane and then gradually Shifts to the Turned Shoulder Plane. This particular Plane Shift is catalogued as the Single Shift Variation (10-7-B).

So, the thought that "the Right Elbow is On Plane (with the Elbow Plane) throughout the Backstroke" is simply a flawed concept. The fact that the Right Elbow at The Top appears to be touching the original Elbow Plane is irrelevant. What is relevant is that the Hands and the Sweet Spot have arrived at the Top on the Turned Shoulder Plane. Alternatively, had they arrived at The Top on the Elbow Plane -- the Elbow Plane coupled with the Zero Shift Variation -- then the Elbow necessarily would be below that Plane. Again, whether or not the Right Elbow appears to be on -- or off -- the original Elbow Plane means nothing. In other words...

There is an Elbow Plane for the Hands and Sweet Spot, but there is no "Elbow Plane" for the Right Elbow.

Gettin' Down With TGM
 

You could consciously return to the Elbow Plane, and if you do, you will have executed the Double Shift Variation (10-7-C). That is, from Elbow Plane to Turned Shoulder Plane and back again to Elbow Plane. This would mandate an Angled Line Delivery Path of the Hands (10-23-B or D).

However, the easiest thing to do would be to stay with the Single Shift (10-7-B) and simply execute a Straight Line Delivery Path (either 10-23-A or C) down the Turned Shoulder Plane. To do this:

1. Mentally construct a Straight Line (of Thrust) from the Right Forefinger #3 Pressure Point to the Ball (or alternative Aiming Point).

2. Load the Lag with your Start Down Pivot Motion without disturbing your Hands and their On Plane Location. In other words, Start Down with your Hip Action (Standard or Delayed per 10-15-A or C) but leave your Hands (and the Club) at The Top. Failure to make this move is where the great majority of potentially good golfers go bad.

3. Finally, take your Hands and their Loaded Lag Pressure directly down this Straight Line Delivery Path toward the Ball or Aiming Point (per 6-E-2) in preparation for the selected Release Trigger. In so doing, you automatically will be Tracing the Straight Line Baseline of the Turned Shoulder Plane.

Incidentally, there is an error in the Delivery Path Component Variation (10-23) of the Swinger's Drag Loading Basic Pattern (12-2-0). If you haven't already done so, correct 10-23-C to read Top Arc and Straight Line (and not simply Straight Line).