I'm wanting to convert my old Stevens 311C 12 gauge into a 23" barreled coach gun to play with in some Cowboy matches. I didn't want to cut down my original 28" barrels, and lose its utility as a hunting gun, so I picked up a spare set of 28" barrels for a Savage/Fox Model B on eBay that fit the 311 frame nice and tight, after a bit of careful filing. This looks like the kind of home project I can handle with hand tools and a drill press, using a mill file and a machinist square to make sure the barrels are square and even. Anybody else tried this, and run across any problems I should know about before I start cutting anything?