Ok, I have bought the stuff to start a build, have practiced the things I was a little scare of and now have a question. When do you drill the holes in the butt plate? Do you drill them prior to the install or do you drill them both together as some books recommend. I took a 2x10 and have shaped it to fit the butt plate. It was for practice before I cut the actual stock. I could drill the holes using it. Thanks in advance for your help.