All right, I have an 1870 vintage Moses Slater cornet, super ornate, like presentation horn ornate. It's seen better days, but it appears to be restorable. Except the leadpipe has about a four inch split down the side. I wrapped it in painter's tape (no residue) and the horn blew (I wanted to hear what a 140 year old cornet sounded like.) I understand there is no patching that. Not sure I'd care to play it if it was. To get it back to playing shape, should I just buy one of the leadpipes available online and use that as a replacement? Whole pipe, not just the split part, to clarify. Before anyone says it, yes, this will see a professional for a good diagnostic. This is quite a history piece, it needs to be checked out thoroughly.