I've got a 1920 Remington Model 11 with a 20" barrel that I love. I want to refurbish it and make it into a HD shotgun. I understand it has no real collector's value, so modifying it doesn't seem a problem. Here's what I'm thinking. Please share your thoughts and suggestions. Thanks: 1. Magazine extension- It has a 4 round magazine and I'd like to add an extension that adds two. Any suggestions? I'd really like a mag. ext. that drops right on, but I don't think they exist. Hope I'm wrong. 2. Recoil/Friction Ring Replacements Source-I need to replace at least the brass recoil/friction ring. Might as well replace both it and the steel ring. Any suggestions for a parts source? 3. Refinish Receiver-All bluing is gone fron the receiver and it ain't pretty. I'd like a durable, easy to apply finish that mimiics dark bluing pretty well because the barrel finish still looks okay. Any suggestions? 4. Gunsmith-This gun runs okay, but it is pushing 100 years old. Anyone know of a gunsmith that is familiar with these nice old guns that could give it a thorough once-over and fix problems if any are found? Thanks for any thoughts. Plus, I'd like to hear anything about these guns you might like to share. Thanks.