On your floor plates I see that you have drilled a lot of the holes, but not all. Was wondering how you were doing it.
I had to drill a lot of holes as I was replacing the inner frame rails so I wanted something that would drill straight and quick. Looked at one of those nice mag based drill units, to much money, instead I bought a small bench top drill press with a little modification a couple of C-clamps it worked like a dream. Also, set it up to drill up, down or sidewise. Advantage was that I could drill at slower speed but faster because of the spindle pressure, it also made the drills stay sharp longer.
http://www.canadianmilitarypattern.com/Tools.html