There are certainly other ways to build a cocking piece aperture
base utilizing any number of slides, etc. PhysDoc's is a great example. From a study perspective I hope to add one of these (original configuration,on a rifle) to my collection someday. To build one of these in the original pattern, I am out. I have the equipment but not the time. I am so slow that I cannot imagine how long it might take. From a using perspective the Rigby pattern is my favorite cocking piece sight and practical to use. It is lighter and I think that matters with all of these variations hanging on the rear of the bolt. All that said it is hard to improve on the Lyman 48, and the Hoffman patterns whether cross dovetailed or the flip up that are rigidly mounted to the rear bridge. Great historical story of Howe-Whelen collaboration.
