I'm a huge copper fan myself, and I think you're right on the beam. One additional word I will give tho... get some Brasso, and do a very careful, thorough and detailed cleaning... dont forget the threads in the tube and the firing pins, then it will hit like a hammer! I love the whole patina thing, that's kinda my maintenance meter. When I have to polish, I just do the whole cleaning bit again, and bingo! I'm always a happy camper.