Modern has passed me by
I have no clue how to use dowels or lasers or whatever. Of course, I got trained by WWII vets and the last sighting in was done by taking out the bolt and sighting in the bore on a big orange vase twenty five yards away.
When it got below zero, those old Russian soldiers use to mix a little gas with the oil on the bolt to get them to work. Probably wouldn't pass a modern warranty. So forget I told you.
Yea, time has passed me by. Dowels!!!