I agree with Jim, pretty much. My Winchester is still original, though I have put my round bolt in for the upcoming So-Cal watermelon demolition derby (the one that was scheduled for earlier this month but was postponed), as we will probably shoot 800+ rounds. For my own casual plinking and local Mil-Surp 100 yard matches, though, I will probably use the original flat bolt.
Now if I was going to use it as a patrol carbine for the high country security contract I had, I'd put it in an Inland M2 potbelly stock, M2 catch for using 30 rounders, and flip safety to keep it from getting beat up and improve reliability. Since I recently gave that contract up in favor of one 10 minutes from home with 8 hour days (instead of that contract with its hour plus commute each way and the 12 hour shifts) I am too old for 15 hour work days!