A couple of diagrams I did trying to get a sense for how much difference might result from running the shortest possible pushrod vs. one at the max exposed adjuster length.

Seems like -- on paper, at least -- there's a significant ratio difference... and not something I'd given much thought to before.

Oh, the reason why the tip of the adjuster ball in the first picture isn't the actual point of measurement is that I was trying to account for my using that same style of rocker with a brand of adjuster screw that's noticeably shorter than what's pictured.