I believe you have that wrong about the basic plane. Zach's swinging on an Elbow basic plane not a turned shoulder basic plane. Trust me, the downstroke is the same as Tomasello's arm action, just watch Tommy's Chapter Series video on Swinging and Hitting. I believe it's last chapter series video. Now Tommy is swinging on s turned shoulder plane with a Straight Line delivery path. Zach's swinging on an Angled delivery path.
DG
I put a straight edge through the right elbow and the ball, and lo and behold, the sweet spot traveled right down that line! You are right DG.
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