I'll give it a crack: as almost all of you know, I'm very big into studying still images and video of the golf swing. The way Brian described the out-toss in the "Ideas" video was such that it did not conform with what I thought I was seeing in these modalities. I definitely saw the tangential, away from the target motion from the top of the backswing but that's not the only component of the out-toss. The "basketball shot" motion of the right-hand (for the right-handed golfer) was a huge revelation because it got me "on top of the club" by being more "behind the face/sweetspot" and less dragged than before when the face would be more open and I'd be into a deeper "punch elbow" position. Nevertheless, I now have MORE forward lean (lower measured dynamic loft) with less path and face variation swing to swing. Now, I use my alignment to aid me in dialing in the direction of my out-toss to play the shot shape I want. Golf is a much easier game.
Thanks for your kind words. My wishes on your recovery. My mother was afflicted with shingles but thankfully she recovered after some time. "Verily with every difficulty there is relief." Bumpy back, qualitatively, improved my transition and through the ball pivot tremendously. Once I saw the changes in my through the ball pivot I was able to make a big change in my backswing pivot! Here's what I mean. Before, without employing Dr. Nesbit's "tangential" component into my swing, I would crash into the ball from the top of the backswing. Cramped, my body could do nothing but extend early and my bumpy was anything but back.
The "tangential" motion fit in perfectly with your writings about the right hip (slower) and left hip (faster) angular accelerations being different coming out of the transition of my golf swing (for the right-handed golfer). The "tangential" kept my bumpy back and with the club and my body no longer shooting out so soon to the ball the club had SO MUCH MORE room.
Achieving improved dynamic stability was the next step. Although my control of face and path had improved tremendously, without dynamic stability, there would be variation in these numbers but mostly, big variations in angle of attack numbers! I used to post on this forum a lot about swings being dynamic. The term was far too vague and another poster, I think John Graham, had called me on it. I owe John an apology and you a thanks because dynamism within the context of dynamic stability as you discuss it is more optimal and tangible. With my previously "dynamic" swing that employed no "tangential" motion and tons of early extension, I would be forced to stall my hip rotation too soon and jump. I thought this jumping was dynamic and I was headed in the right direction with my swing. I definitely wasn't. Now, I make sure I control the up and down (squat and jump) in my swing primarily to control my attack angle which secondarily affects my path.
Quantitatively (but an admittedly rough estimate), my average distance for each club is 5-10 yards longer (6 iron carry from 165-170 to 175-180) and my average dispersion is +/- 5 yards (10 yards offline to 5 yards offline with the 6 iron).
If there's anything more I can add in terms of giving you feedback, please let me know. I'm very grateful for your work and the least I could do is help you in this way.
With bad mechanics and size 12's, of course
I hope that left shoulder is feeling even better.
Thanks, Matt. I think so too. For anyone who wants to mock Brian as a crackpot, go ahead. You're costing yourself improvement. It's a free country. Shoot yourself in the foot if you want.