The same argument about opening chokes "because you bought it to use" can be used when discussing cutting the stock for your eight year old or cutting the barrels because "I missed a grouse because I hit the muzzle on a tree." Do what you want, but by 1985, your gun's value may suffer from its modifications. Oh, my gosh, it's 2007 already and we have learned a little about Damascus guns and screwing with them. A fellow down the street from me sleeved or rebarrelled probably 500 medium to high condition Damascus Parkers through the fifties, sixties, and seventies. Another guy up the street the other way probably bought and sold another 500 medium to high condition Damascus Parkers and didn't sleeve them. Some of the readers here know who those two guys are and can back up my illustration. Those who refuse to learn from their past experience (and the experience of others) are destined to repeat it, good or bad.