I think one of the most overlooked details in Tom's setup is the width of his stance on, say, a 7 iron. It's much wider than mine, and both feet are flared out nearly 45*. Tom, does your stance width and flaring of your feet provide a more solid base to stay stacked over the ball, and does it help limit drifting to the right or left during the back and downswing?
I can say for near certainty that other guys who try S&T have much narrower stances and their right foot is straight and the left is flared maybe 10* at most. After checking my own stance, I barely flare more than 20* on my left foot and 10* on my back foot, and my stance is at least 5 inches narrower than Tom's. I somehow missed this and maybe that's why I run into drifting issues.
Thanks! Interesting. Maybe the flaring looks like more in the camera angle in some shots? LOL. After my own trials it became obvious that a less flared right foot, and a narrower stance (relatively) can promote moving onto my right side in the backswing. And there's a sweet spot for stance width...and my guess is a little wider vs. narrower is preferable.
@GolfLivesMatter - The stock setup for Stack & Tilt prescribes having BOTH feet flared out 10-20°, with both knees flared outward as well but to a slightly lesser degree. Mine are perhaps flared a bit more (though I don't think I'm as close to 45° as it may appear), but one element where you are mistaken is with regard to the flaring of the trail foot. This is essential as it facilitates a resistance-free, body-friendly 45° hip turn that then enables the shoulders to turn 45° without any strain or tension. It also helps us with keeping our weight forward throughout the swing rather than shifting.
As for stance width, you do have some room for personal preference, but never so narrow that you do not feel athletic at setup or out of balance in your finish, and never so wide that your body is restricted from easily executing the motions.