I'm confident all this depends on from which discipline you come from.
And what kind of shotguns you shoot.
ATA guys? Never met a stock alteration they didn't like.
Krieghoff and Kolar guys? A multitude of stocks ready to bolt on are available. And swaps are common.
Beretta 600 series'? A multitude available
Browning Citori series? Endless
When you start irreversibly altering old stocks on old guns, Well, it's a one way street.
And it gets expensive fast.
Since so many are short to start anyway, adding a tapered pad system, and bending the hand can get someone most of the way to their desired dimensions without file work.
