I can't open your link tc but I do know how to static adjust the valves. I still prefer the running engine technique. As far as chasing a moving rocker with a screwdriver, wrench, and feeler guage: I have a tool with the screwdriver attached over the box end that you can operate very easily with one hand. I used to see these in any parts house (they may still have them).
On my hydraulic lifter 235 I just back each lifter down until it clatters, then tighten until it just quiets down. Is this not a good procedure??