Dillin, in 1924, writes about all the 'diddling' going on since the resurgence of interest since the 1876 centennial.
And 'diddling' has been going on ever since then.
Most of the Greatest guns known have been diddled with, from a little, to a Lot.
If someone had the wherewithal to build a collection of the Very Best, but with untouched guns only, the collection would be mighty small!
Down in my collector category, I count myself lucky if I find an Original flintlock on a rifle!
John