Ok Grav, I don't take issue with anything you said.
I still have questions about that mockup in the picture. I'm having a hard time understanding how that configuration of the adjusting screw and the locking nut can affect the valve lash/clearance. How can they adjust anything while at the fulcrum of the rocker? Is the WHOLE rocker being lifted or lowered? And wouldn't that simultaneously change the clearance on the pushrod side?
It looks ... I don't understand how it works. Here's a picture that has similar looking roller tip rockers but with the adjustment NOT at the fulcrum/pivot point, but closer to/over the pushrod end. THIS one I comprehend.
https://www.chevyhardcore.com/tech-s...sh-like-a-pro/
...
I read some more, I guess I did intuit it correctly, I just haven't worked on one myself. The whole rocker does lift, pushrod side and valve side. Huh.
http://garage.grumpysperformance.com...ng-valves.196/