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Does anyone know of a water catcher/grime gutter that would fit on a Besson New Standard Bb tuba from around 1967? The valves are quite leaky and I'd like to not leave a puddle every time I play it! I checked with Wessex and John Packer and they said theirs wouldn't fit.... I'm also open to DIY solutions if anyone has them!

Thanks in advance!

An easy cheap fix is use a nitrile glove such as medical professionals use. They stretch so should easily fit most horns. Also good for Sousaphones when marching.