The way I see it, the most important dimension for minimizing sweep is the distance from valve tip to rocker shaft centerline measured parallel to the valve.
Agreed, but I'll point out my comment regarding the diameter of the roller tip changing things still stands if you only change that one variable which is what I was referring to. If the only thing that changed was the roller tip dia, it "rotates" the arc down. When that happens, the horizontal travel increases slightly.
In these two drawings, you changed the height of the rocker fulcrum at the same time, which is of course required to make things work.
I'm not arguing, just learning by looking over everyone's shoulders.
Your efforts are appreciated as it's good to see these things represented in a way that shows the geometry.