bsa I have modified a few and used actions for customs, too.Some of my post was TIC,although I get guilt issues sometimes myself.
Hey it happens and no big deal. I treat it case by case,rifle to rifle. I bought 5 rifles out of a collection....rifles were mint,all of them and hanging around unused since the 60's. The 375 was so nice I could not bring myself to mess with it at all,and knowing it could crack at some point, I sold it.I replaced that one recently with a "user".
The stock will get sold because it isn't all original to the rifle anyway and I won't need it.
Like you I use them. I don't collect. Setting the stock in a corner and getting a second user stock does no real harm anyway. A guy can always put it back together.
