You are correct, you have no experience with TrackMan or understanding the D-Plane model. I see those numbers on a daily basis, the extremes coming from typical amateur handicaps. I'm not pointing out any 'flaws', I actually stated the information is good from a mathmatical standpoint. If you've seen any of Joe's videos, as well as the recent post, you'd know that the explaination of how AoA affects club path assumes a face angle square to the target. One scenario, -4* AoA at a given 45* swingplane with a resultant path of +4* and the other +4* AoA with a resultant path of -4*. I doubt you are conceptualizing this clearly, but essentially both swing scenarios deliver the clubface square to the target from two different locations on the arc of the golf swing. The first swing is well before the low point or horizontal swing plane and the second swing is well after. When you make contact with the ball that far forward it is quite easy to have closed the face down to some extent. There's a whole different argument about how much the face rotation through impact affects the balls spin axis, but I highly doubt you could conceptualize what i'm saying in a golf forum.
Please use quotes. Don't assume that I do not understand have any understanding the D-Plane. It is very difficult to understand though how it can be down and out and up and in though. I am not sure I get it. Must be an entire dissertation I need to read on it somewhere What I am saying is that I have never seen a player consistently hit the ball with the driver face square in relation to the path. And I can imagine it is not square to the target the majority of the time either. Slightly one way or another. If I set up square and hit up on the ball the face is slightly left of the target and cuts back to it. Maybe the model assumes a square face to the target, but that is not reality most of the time in a real swing. I know that some players have fast closure rates, but I still think that is an issue that should be corrected and not covered up by changing AoA to fit the rate. They are still going to be inconsistent at best. I understand what you are saying about face rotation through impact very well and how it could affect spin, you are assuming I can't understand so we will let that be. It is not what is being discussed here anyway. I may not have experience running a TrackMan but I have seen plenty of the number and charts and other evidence to support that hitting up on the ball is better for most players with low, average and above average swing speeds. As for this type of who doesn't understand rhetoric, I am no longer interested, I said what I have to say and I am out.
When you figure out what you are trying to say about most golfer's let me know. It must be a "conceptualization" issue.
Yes I have been on a TrackMan but this thread is not about my numbers. I was essentially trying to asking how much additional left curvature the path an extra degree to the right in relation to the face brings.