Joe Nichols said that you practice a perfect golf posture everyday. What he mean by this? It was literally getting ready to sit in a chair. This was his very simple and effective approach.
Joe Nichols viewed the shoulders as a pulley system when it came towards the beginning of the backswing. He ingeniously linked the hips, the hands, and the clubhead lever system so that it was impossible to get the clubhead behind you. This is part 1 of Joe's backswing.
As you engage the hands and utilize the shoulder action, the knees do something specific. Here is what they do and, more importantly, what they don't do. You can even see this mirrored in Jack's lower body.
Joe described the transition of the lower body as "Hitting against a firm left side." What did he mean by this and how can you incorporate this into your swing?"