Surely, once you have matched the BOLT to the rifle BODY and set the rifle up correctly, set the bolt up, then renumbered the bolt etc. exactly as an Armourer woulod do with, say, a part worn bolt and nose cap, then this originality thing is academic. After all, that what we'd do every day of the week - even with No4T's and L42's. I wonder how many L42's for example have re-numered bolt bodies that the current owner would never even notice unless he took a micrometer to the arm.
Or am I missing something