[Yoda]

In reality, the ball position in relation to the left shoulder has not changed.

Loved your post, tradekid. The 'between the lines' not-so-sentimental journey was just too much!

On the technical side, with the Ball Position constant in relation to the Left Heel, you are absolutely right that the movement of the Right Foot determines the ultimate Ball Location. However, with the the Head remaining Centered between the Feet, then, as the Stance widens, the Ball Position will change markedly in relation to the Left Shoulder. Step 'wide right' and let your Head (and Left Shoulder) go with you, and you will see exactly what I mean.

So...

With Head centered between the Feet (or nearly so), the closer the Right Foot is to the Left Heel -- narrow Stance -- the more the Left Shoulder is positioned 'forward' (and therefore, the more the Ball is positioned 'back'). And vice versa: As the Right Foot moves away from the Left Heel --wider Stance -- the Centered Head and Left Shoulder also move 'back,' effectively positioning the Ball further 'forward.'