Its your money, spend how you wish... however, my unsolicited opinion is that you would end up with a shotgun worth half of what it currently is. Would be losing chokes, which is really everything with a shotgun. Even if you had the 2.5'' shorter barrel re-cut for chokes, no one would be interested in buying that unless a serious discount. Going from a 28'' gun to a 20 or 18 is noticeable, going from 21 to 18.5 is not a big deal with a long gun. Either way good luck, and if you decide to wreck a $2000 shotty, please post the pics!