Great explanation of D-Zone coverage. I think your positioning of the strong side winger (I call it F2) is a little too far away from the battle in the corner. He's a little too far away from the boards if the puck squirts up the boards. I'd want him in reasonable reach of the boards roughly on the dot or a little lower and outside the dot - maybe 2-3 feet. This way he stops a pass to the opponent weak side D, he can possible get to the wall to stop or disrupt a pass to the opponent strong side D, and be in a better place to cover his man - the strong side D.