"Perhaps the guy is asking, as would I if I were learning about levers, what the half pulls and fulls, how you drive the shot, affect the flavors."
The difficult part is a half pull or a full pull will only affect the flavor on that particular 'built shot'. And each built shot at the moment is different from the next built shot depending on how I grind, dose, tamp (remember I am messing around with light tamp and harder tamp) and basket size. I'm not setting up 10 shots with identical grinds, dose and tamp in the exact same basket and then deploying 10 different extraction approaches against them. I'm now in my natural learning curve... which always has me morphing through multi-variables as I rapidly absorb more and more knowledge. Kind of like SkyNet trying to become self aware on a lever machine. ;-)
"A question that I would ask is this; if, while your PVL was en route, would you have wanted more information on its use, and would said information had any actual value to you?"
It's a good question,and my answer is that I wanted a lot more information than was out there... prior to making my decision on getting the PVL. Once I made my decision to go with the PVL I think the videos I've put up recently would have sufficed to lead me on a natural learning curve.