I apologize for starting yet another thread on the Brooks B17 but I have searched and searched with no answer. It would appear I have three choices for rails - steel, copper or titanium. Ti is just too expensive so ....... is the difference between steel and copper only cosmetic. I want to get the Champion Special which comes with large rivets and copper rails. I am a heavy rider and am concerned about the copper rails being strong enough. Are they actually copper? Can't be! Copper plated? Any suggestions?