[Daryti]

Not sure what you mean by applying acceleration at PP#1 with the right shoulder.

I think that sentence from 10-19-C refers to the use of Accumulator #1. That's not a 4-2-3 Triple Barrel Swing.

You can add acceleration to the Primary Lever Assembly with the Right Arm (Accumulator #1) - as long as you don't actuate the Secondary Lever Assembly (the Club) with the Right Arm, as long as you don't drive the Club with the Right Arm, the Secondary Lever Assembly is still being pulled longitudinally by the Left Arm, and it's still a Swing.

Since #1 is used, does it become 4 barrel? And since 4 Barrel is a hitting procedure, it becomes 4 barrel hitting?

Or it means using #1 passively (not actively for straightening the right arm), it still a 3 barrel therefore swinging?