Well in to the "builder vs assembler" range of cams.
Rocker adjuster nut is .5mm/turn so you can extrapolate the ratio and distance to utilize what I call "negative lash" technique to check coil bind, confirm piston/valve clearance after changing timing, etc. It's a little less math on my bike stuff since the adjuster is at one end of the rocker, but you can get it pretty close.
Or, at least, roll it to max lift and put a big thumb on it to make sure the spring isn't bottomed.