[6bmike]

As you describe, pp3 first- as it snaps the wedges in line and then pp1 as the right elbow folds and cocks acc2. On the downswing pp1 til release (5.5), then pp3 into impact.
Educated Hands means they need to monitor a whole lot of things through the pressure points- all at the same swing interval. Depending on the Stroke- pp2 is uncocking at some point. PP3 is the clubhead as well as a passive or active pressure point. And I like to think of pp4 as “the Flat Left Wrist”- the ‘lower end’ of the accumulator. The Hands are the club.