I wouldn't care. Too many people get hung up on modifying milsurps and how bad it is. Realistically, modifying any collectible is bad, but collectibility is born out of rarity, and milsurps are anything but rare. They made about a bajillion point five Mosins during the last century, like many other milsurps out there. There is no shortage of them. Most sell for next to nothing, and its very telling that when they "dry up" and get "expensive" they're still barely pulling what a new budget rifle costs.
Your average sporter rifle made during those time frames is FAR more rare (and to my eyes more collectible), yet you don't see too many people getting light headed at the sight of a refinished Remington Model 30 (heck many "purists" would erroneously condemn it as a chopped up Enfield if they saw one
). I guarantee you though, in centuries to come, THOSE will be the rifles that are collectible and rare.
Just an example, total Remington Model 30's produced: 3,000
Or take another sporting rifle that has run its course:
Total Remington Model 788's produced: 565,000
Now, look at milsurps:
Total Mosin-Nagants built: 37,000,00
Total Mauser 98k's built: 14,643,260
There are a few that have some rarity (ie, the Schmit-Rubin K31 had a total production of only 528,230 units), but for the most part, milsurps are the mass produced trinkets of the gun-world.