ok... from extensor action .. i highlight 2 sentence in 6.B.1.D
ALSO
10.18.A
I highlight
A "feel" of a turn, but nothing turns out of relationship on the shaft. Lynn explains and shows you on the vid. Watch viewing.
either pp pulls the shaft inline as it flattens the left wrist. It doesn't matter which pp you zone in on as long as the thrust is inline with the shaft.
The left arm is like a dog leash and the right arm is the dog running away only to be prevented my the left arm leash.
The right arm can apply an inline thrust- Extensor Action and a driving right arm moving the Lever assembly at the same time. Two different thrusts as spelled out by Homer Kelley.