I am of the opinion that if the gun if a field grade gun and unless it is a pristine example, go ahead and have fun.
Better yet, someone else can do it and then sell it to me at a discount. That is the way I got my 20ga superposed. I have posted pics before. It is a 28" 1959 20 ga that has a very nice stock by Art's, engraving by Jeff Flanery re-blue and cased by Bill Schwatz plus brileys. It would cost *k-10K to duplicate today,... I paid 4K.
As an off shot, I also believe that any gun, unless it is a rairty, if in "well used" condition as a "right to be upgraded". I think of it kind of as a reward to restore a gun to like new condition.
I know a lot of you don't agree with that. I pormise, I won't do it to anything in "great" condition.
Jerry