Weston:  That's a mighty handsome rig you've assembled!  Your Redfield sight nicely matches the finish on your Krag.  The mounting screw looks good.  If you encounter any roughness in your cartridge feed due to the Cutoff being absent, here is a 1963 hint from William's Gunsight Company.  (However, rather than ruin an original Cutoff, I would just have a nylon, brass, or steel shaft fabricated to serve the same purpose).

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