I am curious to see how your question gets answered.
I would add another related question. If a swinger powers the golf swing with a 4:2:3 release pattern, what % of the total power is due to PA#3 release? In other words, does PA#3 produce power independently or does is it simply transfer power?
Another related question is how can PA#3 produce power independently if the release of PA#3 is essentially passive - due to external rotation of the left humerus that happens naturally/passively during the release of PA#4 and a small amount of left forearm supination, which is merely a passive reversal of the left forearm pronation that occurred during the start-up swivel action?