I need some advice folks. I have an older Holton T602 which I can still make very good music on, but, the leadpipe is needing replacement as it is corroding a bit. (The rest of the horn is fine though, laquer is about 90%, not bad for the age) Is it worth it for me to have the leadpipe changed to a larger bore copper leadpipe? A custom made one will cost me about $250 CAD installed. Or, am I better off just using that money towards a new horn? Thanks for any advice and feedback!