John,
As Jerry's tutoral shows, the easiest way is to aim the scope with Reticle Tru at a light, align the reticle as close as you can. Then, move your head to the left and get the verticle part of the reticle aligned with the edge of the slit. Then try it on the other side. It's not hard, even with 60+ yr old eyes, to align two parallel lines very precisely.
And, as shown on a previous post, I put blue painters tape in the "V" of the tool. With a shiny finished scope the Delrin was too slick and it wouldn't hold postion. The tape added just enough friction to make it work. On matte finished scopes, there didn't seem to be a problem.
This tool does save some serious time and aggrivation getting the reticle aligned just right.
And, I've noticed some factory rifles with the scope screw holes, canted off center. You'd think they'd have a jig to drill those without error. I have one now that I'm going to have to redrill to make it right.
DF
