My LA Benge has developed a case of red rot in the lead pipe and the tuning slide. Is red rot traditionally found in these locations or can I expect it to be found or starting in other parts of the horn. I am trying to make a decision if I should be buying a new horn or having the parts replaced on this horn. I have had this since new(1974) so it is a tough decision. I am concerned that it will not play the same and if I do these repairs can I expect to replace more parts of the horn down the road due to additional red rot. Any advice on this would be appreciated.