You need to keep in mind methods that minimize disassembly. Gun scrubber, Ballistol and an air compressor are your friend. I would never unscrew and drift out fasteners just to get access to the breach for routine cleaning. Get yourself a conical cleaning rod guide made of brass to work bore brushes from the muzzle if you must use a brush. I have several in my cleaning kit to protect the muzzles of lever guns, pump guns, and automatics without breach bore access. Screws are not meant to be used for routine disassembly, let alone drift pins. You will wear out and loosen a gun pretty quick if you frequently disassemble it for simple cleaning.