I have done several front Trijicons on both J and K frames. It's easy enough to cut a good notch and then insert the blades. I have noticed that, if you undercut the notch at each end you can actually press the front blade in...although I do use an adhesive to hold them. A great consideration is getting the elevation on the front blade right. I think it's a good idea to use just the front as a night sight. My conundrum is figuring a project for a couple of sets of Trijicon rear sights.