Winchester sold new Mod 12s with ribs by Simmons, so it's not really that big a deal to add one to an old beater. A friend found a thrashed and trashed 20ga Mod 12 and sent it to Simmons a few years ago for a full redo, including new rib and new wood. The original gun was a complete beater and the redo was money well spent. It's a shooter, and he'll have it for a long time.