Here I am again, a month late.  And with a different POV than the purists.

Dick has an 1896 carbine-barreled action that can be traced to Boxer Rebellion service, a 1901 sight that is not quite period-correct, and a long carbine stock.  Presumably, all those parts went together at Benicia when the carbine was repaired or upgraded, but we don't really know that.  Probably none of us were even born when that work was done.  Unless the carbine comes with something that documents the sale, the post-Boxer history is kinda fuzzy.

We need to ask ourselves "when and why were the upgrades done?"  How much was really to repair service arms?  How much was just to make surplus Krags more sellable?  How much was just to keep a skilled workforce employed, knowing that they would be needed in the future?

We are not the first generation of Krag collectors and enthusiasts.  Those guys were our grandfathers.  We're simply the first Kragistas with access to a bunch of information (like the SRS lists) and the means to transmit that info & our opinions around the world in a few seconds.

So my opinion is "go ahead and return it to the same assemblage of parts that it had at Peking." Swap parts with the other '96 carbine.  That's nothing different than what would have been done at Benicia. The post-WW1 rebuilds didn't have much to do with keeping the Krags in service, but only to get rid of them faster.