Early Colt Officers model here ..... picked it up used at a decent price way back when, ditched the stock 2 spring setup and milled the slide for a one piece guide rod and put a wolff spring in it , absolutely cannot limp wrist it w/ Cor-Bon 185gr JHP +P's, VZ Simonick Gunner grips on it and my full size 1911, skateboard tape wrapped around the front of the grip and held by the VZ grips, you can get a death grip on it w/ this setup and it helps prevent limp writing it, did some hard cleaning on it when I first got it slide seemed to gall just a little, greased the rails and pumped a box of Remington 185gr JHP +P's strong arming it to keep down muzzle flip and keep the slide going in as straight a line as possible, now I keep a few drops of Mobile One 0-5 full synthetic oil on each rail, when its time to change springs I'm going to try a flat spring