I have repaired a couple of them, for practical reasons. One was a bolt MM shooter, and the thing would come apart as it was shot. The other was a very nice matching one, but the pieces would not stay together and could easily come apart. If your rifle is not a shooter (collector only), and the pieces stay firmly together as-is, then I would see no reason to do a repair. (If the parts are loose and you fear them coming apart, you may only need to tightened them up to stay put. I have had one that had a piece of thin sheet brass put between the stock and barrel in order to tighten it up--a simple fix that helps keep it together without making any changes to the rifle--but it would still work its way off if fired a few times.)