Working on fixing up a recently purchased Rock Island 1911. Most of the upgrades I have figured out except the sights. I have the Rock Standard FS with dovetail front and rear sights. Wanting to replace the front sight with a fiber optic, and the rear with an adjustable sight. Has anyone done this, or have any recommendations? I have looked at dozens of websites. All I am getting is confused. I did find a website (Dawson Precision) that has sights specifically for the Rock Island. Just no adjustable sights. From what I have been able to determint is the Rock Island uses a slightly smaller dovetail than the Novack. The Rock is .488 x 65 and Novack is .495 x 65, and that they may fit with some filing. Anyone have any experience solving this? Any help will be appreciated.