Watching Will’s swing the first thing I noticed even at full speed was the initial widening of his wrist angles in transition, a movement that has been called “casting” but with the newer anatomical descriptions is now “ulnar deviation” of the left wrist and “radial deviation” of the right wrist. Looking for a reason that this is happening I start at the beginning of his swing and suggest that he center his set up rather than start with more pressure on his left side. In the takeaway I’d like to see more extension away from center with the right arm gaining space and not staying stuck to his right side while the right hip gains more depth. By staying wider at the top he might be able to feel that he is adding pressure to his right foot toward the heel, and then if he tries to add more pressure in order to shift from right to left it would likely eliminate the lifting that happens just as he reaches the top. He should add some wrist cock to the width he gets at the top so that in transition the club might bend back into his wrists instead of his hands pushing the clubhead away from him. Adding stretch in the backswing while loading right and into the ground will give him the potential to lag the club and produce much more clubhead speed.