For me, the hitting impulse is programmed at the top of the swing. When my pivot moves my hips, right shoulder and right forearm into position, the #3 pressure point increases and moves slightly aft. I'm ready for this sensation and then begin to drive my #1 and #3 PP toward the aft inside quad od the ball. It seems more of a thrusting pitching motion rather than a straightening of the right elbow. The #1 PP subsides or stays constant about halfway thru the release and the #3 PP increases dramatically. The pivot plays a huge roll in this procedure because without the hips aligned properly, I don't sense the #3 PP moving aft and traveling toward the aft quad of the ball. Then #3 PP becomes more directing than powering.
I can also right arm thrust by using tricept muscles but this seems more of a punch sroke and my right shoulder has to travel further down plane to the ball and occurs much closer to impact. Not as massive feeling, but effective.