'Jon' - I agree with Culpeper, leave the sight alone. Very early on, Springfield Armory changed the sights and replaced the model 1892 sight. Your Krag has an early and scarce sight, that Springfield likely installed.

IMHO - Your Krag is a very interesting 'time-capsule' and should be left intact. Even the wrist repair is interesting and should be left alone.

It would be worthwhile to get a reproduction Cleaning-Rod and it would be neat to have a model 1892 rear-sight, as a conversation piece. Otherwise, Do No Harm!

Thanks for posting your photos and sharing!

(p.s. - I lust for your Krag. It's interesting)!