Thanks Parson! Way back, 30 years or so ago, one could still get parts from Navy arms. I managed to find the Baby's cylinder somewhere (.31 cal) still had some engraving left. The rest is completely scratch built. Back then, I had an old electric motor with some kind of disc I used to grind out the interior of the frame. The recoil shield I chucked in a drill press and turned against various files. Crude as the devil but probably as much machinery as the originals were made with. Used the Navy, of course, for patterns. No clue as to how many hours I have in each. Never had my hands on an original, but I'd guess you'd be hard pressed to interchange parts from one to another without hand fitting.