OK. Art plays the ball off his trail foot even with the 5 iron.
His head is ahead of the ball at address and throughout the swing.
Put some tape lines down on your deck marking ball target line
and a line at right angle to it. Then work on your setup in
relation to the ball and your "slantidicular".
It is notable that Moe is behind the ball at address even to his
lead shoulder and Art is ahead of the ball at address almost to
his trail shoulder. That to me is striking.