I think for many the dividing line between legitimate restorations and "fakes" is the re-serializing of parts. At least here in the US of A that seems to be the case. Sort of that I think most folks do not see an issue.
Being from the shooting side of the Enfield collecting world, adjusting the fine fits to get the rifles back to correct service bedding is something I have done many a time. To a purist I have messed with the rifles, but to me a rifle that is not adjusted for best accuracy is sort of an anachronism. Once a rifle gets to the point where accuracy is of no concern it is no longer a tool but entering the realm of a relic.
I actually know folks that think that cleaning the stock or adding linseed oilto a dry stock is altering a collectable arm. That is the true collectors and those folks by in large are not shooters.