[Yoda]

At the Top...assuming wedges are intact. If I were to drop my Left Arm would the resulting straightening Right Arm straighten back or straighten in, or straighten back, up, and in? In other words, what is the direction of travel of my Right Hand without the Checkrein?

And while I am at it...is the stretching (of the Left Arm) with the base of the right palm, the right index finger and right thumb, or both or either?

The separated Right Hand would continue its On Plane Motion -- Up, Back and In.

I use Pressure Point #1 -- the heel of the Right Hand against the Left Hand thumb -- to stretch the Left Arm (only). If you want to stretch the entire Primary Lever Assembly -- the Left Arm and Club -- into line (as in an Extensor Action Takeaway), then you would use Pressure Point #3 (the Right Forefinger) to pull on the Clubshaft.