It's funny you posted this. I was going to post almost an identical topic. I went to my first archery lesson ever tonight. I've only been shooting for 23 years so why not.
I have the Rick welch video (II) and was trying to fix some inconsistencies, but I needed another eye. Our local shop owner was an Olympic shooter in the 70s and he teaches COMPLETLY different then anything I've ever done. He worked with Earl Hoyt back in the day. (I'm 20 min from Mr. Hoyts old house) Jack shoots a earl Hoyt trophy prototype from back then and he also shoots the decked out Olympic rigs.
His biggest form fix for me was to work on my grip and my draw arm. My draw elbow was too low ( it was straight back) so he wanted me to rotate it a bit and get the forarm above the upper arm , not parallel to it. And my grip.
My grip, this is the hardest pill to swallow. He is having me tuck my the pinkie, ring and middle finger back, with a bent wrist and pressure on the lifeline. I get the palm down, I did that before. But the finger tuck is what I did with a compound. Everything I read about straight grip says to actually HOLD the bow. Now, once I got it down I did not feel anymore hand shock or thump than before. But it goes counter-intuitive to everything I've ever heard or read before.
I have watched moebows videos and it looks like he actually HOLDS the bow. I am going to give it an honest try but I'm not sure about it.
He did teach for hunting type shots to anchor corner of the mouth area, but everything else was right out of the NTS stuff I have read.