Took my Milspec 1911 to my local gunsmith to have it Cerakoted, which he did a terrific job. But he mentioned to me he had trouble getting the sights back on. When I got home I really started examining them it appears they are not on correctly at all. This is my first 1911 so I have no idea how to install or even take the sights off. I would like to do this myself since he has clearly demonstrated that he cannot. Any insight is appreciated.