[tongzilla]

These thoughts from Johnny Miller on ball position relate to swing low point and appear logical.

"The correct ball position at address is another important fundamental. My key here is to use the left shoulder, not the feet, as a reference point for where to play the ball. Unless you’re trying to hit an intentionally high or low shot, the ball should always be played off the middle of your left deltoid, right about where the muscle attaches to the bone. This allows you to use the best part of your swing arc, with your left arm returning to impact fully extended from the shoulder, and the right arm trailing and supplying the power.
Why not use the left heel as a guide for ball position? The feet are relative. If you have a very wide stance, playing the ball off the left heel will put the ball too far ahead of your shoulders. If you have a very narrow stance, playing the ball off the left heel will put the ball too far back; playing the ball off your left shoulder gives you a constant reference to work from."

This is amazing stuff! Makes me wonder if Jonny Miller knows TGM. He's the first non-TGM person I know who has made this point about ball position.