My 1970 Raleigh Sports has a Brooks B-something-or-other. It isn't totally gone. It is still supple, like a very old bomber jacket, but it is starting to tear at one of the front rivets. The saddle needs to be tensioned, but I am afraid to move forward and thus wrecking the saddle. What should I do to keep this saddle alive as long as possible. I fear oiling it will only make the problem worse. Any thoughts? Are there any products that will bring it back to life and stop the progress of decades of neglect? Should I attempt to sew around the offending rivet?