[svsvincenzo]

That’s the Law of the Flail (2-K). The Clubhead is accelerating (Centrifugal Acceleration) until it becomes in line with the Left Arm (Full Extension). Then it settles into Centrifugal Momentum.

Accumulator #2 provides the Downward Motion for your Three Dimensional Impact (2-C-0).

But you are free to execute Impact during Full Extension (with an Uncocked Left Wrist). Homer said that "produces a 'soft' Impact and is very useful simplification" (2-P).

Law of the Flail applies to just PA2 (a Flail doesn't gave a roll/tumble), correct? And PA2 precedes and causes PA3 (Roll TRANSFER Power), correct?

So even if PA2 is spent, PA3 is still doing it's thing. So, even if you reach full extension/uncock at impact or bit before it, the sweet spot is still up to speed as PA3 (and PA4, and PA1 if you use it, as a matter of fact) isn't spent until after impact?