[golfguru]

Got it.

One thing I notice when I allow my shoulders to rotate like this was that I was not making contact with the ground in front of the ball. The low spot is NOT opposite the left shoulder but is at address position.

This is what made me believe that I was doing the drill wrong.

If I only allow my arms to move (with the "right arm feeling like a piston") then I get more of a divot feel in front of the ball.

The levers length - arm and club are both for hitters or swingers the same length which is (hopefully) what you set up alignment wise at Impact Fix. Whether you swing or hit you hope to pass through Impact Fix with that same length from whatever your Address type is. If you do not hit the ground, then you have changed either the length of the lever (check that FLW and EA), or the Height of the machine (Bob) or Swayed the machine changing where the Low Point would have been.

If you keep the image simple, at Impact Fix you have a lower case "y" which is being lifted and taken through impact. If you start from Impact Fix its easy mentally to monitor Basic Motion. Start from say Standard Address and your "Y" becomes a "y" during the mini takeaway. If you don't take a divot it's likely you are going back to a Y at you hit the ball and so will most likely get all ball and not ball, big ball