I just got my first pipe with a Cumberland stem, this beautiful poker from OldSchoolPipes (the "secret" alias of a certain renowned pipe maker who happens to patron these forums). I absolutely love the pipe and want to cherish it well. I bought it with the intent of having it be my new hands-free/active smoker, so I'll probably be clenching it a good amount. Any particular tips on caring for Cumberland well? I don't know anything about how the material compares to normal Vulcanite in terms of hardness, oxidization potential, durability, etc. The safe bet is of course to use a rubber bit, but if there's anything else to know about stem care I'd love to hear it. Thanks!