Originally Posted by Zeph
Right. But to be fair, you have no idea which interval (+/- 1, +/- 2, +/- more) you are actually in. To me the use of discrete values for impact angle seem like a mute point if the average player has no baseline or way to validate +/- anything. It's all theoretical unless we've got an easy way to map and validate the angle at which we impact the ball.
Similar to what Zeph was saying, each player needs a way to translate the different impact positions into swing thoughts.
I know that I want to find roughly the same position at the top with my irons and my driver, although I'll think about getting there a bit differently. With the driver and 3W, I'll think about extending away from the ball slightly more than with my irons, slightly widening out my arc from the ball.
Visualizing a "sweep" motion through the ball is helpful for me.
Also, be mindful of your spine angle at setup, and how this may change depending on the club you are swinging and the shot you'd like to hit.