Taggsy, you seem to have misunderstood the tone and nature of this thread and our use of "terms" like "PA5." Clearly this isn't a technical discussion because, "per the definitions" and "per TGM", there is no PA5!!!
This thread is not a technical discussion of TGM. Dave and I are confident in our TGM knowledge, and I'd caution you on saying that our "understanding is wrong," particularly if it's based largely on this thread.
This thread exists simply because this "right wrist throwing action" has not been discussed much at all (the Flail doesn't cover it, sorry), and in many circles instructors get too caught up in "maintain maintain maintain maintain" (right forearm flying wedge) when that's clearly not what happens among the game's better players. Clearly the game's better players are not "maintaining" the RFFW well into and beyond the follow-through.
Not once have I said "the majority of the book is wrong." I have tremendous respect for the book and its author.