[Daryl]

If I'm trying to bust one I can pretty much stop thiinking about extensor action from release point on, because I couldn't bend my left arm if I wanted to. As a swinger, I believe you feel it strongest through impact as that is the point where you left shoulder is going up and back at the same time your club head is still traveling down and out and seeking its inline condition. This is when you'll most feel the centrifugal force of the club head moving away from the center of rotation, your left shoulder.

Perfect. I agreeeeee. And moving the ball back in your stance disturbs that alignment.