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I am looking to convert my Martin Renowned BBb Tuba to Front-Action and I need a 4 valve front-action piston valveset (preferably with slides) that has a somewhat large bore and is in somewhat decent condition. (looks do not matter to me at all) I don't care at all about brand/finish/year and will consider anything you throw at me.

Contact me at john neumann tuba AT g mail DOT com or message me on TubeNet if you have something that might work.

Thanks!

John