The right index finger has two joints and one knuckle. The Angle of Approach is a cross line deal with a Closed Plane Line for Hitters to Cover visually with their clubhead, cross line. Cover in Steering like fashion.
The #3 pp at this point in the swing is .....the first joint. For the Three Barrel Hitter the lag pressure point will always be the first joint, for the Four Barrel Hitter who Drag Loads in Startdown ........he'll sense Lag at the Knuckle during Longitudinal acceleration and then at the first joint during Radial Acceleration.
I didn't know any of that. Whoa, that seems way deep for me.