It also matters if you are a "collector" or a "user". Guns range on a scale of quality and value from being "art" to "funtional-art" to "interesting" and then finally as a "tool". IMHO-If a gun has given many years of good sevice to someone near-and-dear to you, then by all means keep it as a memory of that person, as little changed as possible. If, however, you mean to use this device to harvest game as efficiently as possible, then make it suit your purposes. If that means opening a choke or altering the stock, then so be it.