[Yoda]

Yoda,

You wrote, "In Four-Barrel Left Arm Swinging, the Right Elbow drives only the Left Arm, not the Club."

I see a Sea Change here! You are NOW saying there is 4-barrel Swing. The problem here is that with any grip OTHER THAN A CROSSHANDED ONE, it's not possible for the Right Elbow to drive the Left Arm without also radially driving the club, because the force will be applied between PP #2 and the clubhead.

There is no Four-Barrel Swing wherein the Right Arm actively Drives the Club as a substitute for Centrifugal Force. Such an action is, by definition, a Hit.

However, that does not preclude the Right Arm's support of the Clubshaft Pull through Pressure Point #1 (10-19-C). And when the Swinger applies Right Arm Power in any manner other than active Extensor Action and passive Lag Pressure, the Stroke may be properly labeled Four-Barrelled.

Actively or passively, Pressure Points #2 and #3 drive the Hands. Similarly, Pressure Points #1 and #4 drive the Arms. This is true regardless of an individual Pressure Point's Location with respect to another. Therefore, it is possible for the Right Arm to actively drive the Left Arm (through Pressure Point #1) at the same time Centrifugal Force drives the Club (through Pressure Point #2).

For the reasons stated in my prior post, that does not make it advisable.