This must be done with the right shoulder and not the right triceps, so the part of the sentence in 10-18-C, which is confusing is "further acceleration", which implies something else was accelerating PP#1 earlier. That could only be the right triceps. In a 3-barrel Swing only the driving right shoulder should be applying acceleration at PP#1.
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.
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