I found the note on marking parts interesting. The screws go in and out of a rifle many times over the course of the build, and so need to go back into the same holes. So I cut a file mark on the shank of my screws too...one cut for the rear most screw, two for the next, and so on. In addition, I have a strip of maple with holes drilled and labelled to hold the screws rather than toss them into a container. The first hole, on the left hand end, is for the rearmost toe plate screw. I end up on the right hand end with the barrel retaining pins. I've used this system for years, and I got the idea somewhere...likely here.