FYO Stoney Point used to offer a service that would drill and tap a case fired in your rifle for the "custom fit" and minimizes the headspace error..the "drill and tap" your own idea is the best way to go, especially if you have a lot of rifles..the custom piece of drill rod to replace the aluminum or plastic rod that comes with the tool is an excellent idea..I found when the set screw hits the concave surface of the rod you can see it move a little (mine is aluminum, but I see they might be plastic now?)..The problem I percieve with the drill rod is when you go to measure the COL with the comparator the case might be off center?..Maybe if you try to keep them aligned the same when you measure it doesn't make any difference?..Anyway, IMO it's a good tool and better than any other method I have tried..just what I do..
art
