Harland sharp roller rockers - measure pushrod length

Let me see if I possibly understand. It looks as if my HS rockers could stand to come back on the stem a bit. So if I were to have the stands milled down whatever thousandth needed that would back up the rocker? How drastic of a change to the geometry? Which way good or bad.
Mill the stands with a roller rocker? Bad, very bad. Lash caps are also very bad in most cases.