Perfect outcome. Yep, trial and error is how I came to grips with my remaining Vulcan's standard trigger (have a one of 110 Vulcan SE in .22 which I don't want to divorce from standard in any quarter), too. Am no where near as good a shot as you, however, as on open sights at ten yards (not tried 12), I am content to achieve touching hole clover leaf groups.
That sounds like real fun, and I'll give that a go sometime, but for me, and so as to get the one hole thing started, I'd need to maybe start at eight yards and move out with progress (and to make it even more interesting, make the follow up open sight rifle my AIRGUNAID SP5 .20 Hunter ). Atb: G.