I am working on restoring an RT Micromag that has been sitting in pieces for years. I can't seem to find the correct frame screws. The front screw should be easy enough to match. The rear screw is what I'm concerned about. I need a thumb screw that can go through an intelleframe, a 68 classic rail and into a RT Micromag valve. The rear screw from my Emag is too long. Is there a specific screw I need? Can a get one from AGD?