Taking a tuba apart...how-to DIY

[Dan Schultz]

..... I then remembered also that not only Dan Shultz A.K.A. TubaTinker has some used pistons but also my friend here in California John Thomas.....

It's true that I DO have some used pistons and such for those short action tubas and sousas. But... do you know what happens is I sell those used 20/22K sousa pistons? Well.... if I need some in the future, I have to shell out over $150 each for 'em. If I sell the used 20J pistons, I can't EVER buy any new ones. Long story made short..... I seldom sell rare USED parts because in my opinion, they are worth just as much as new ones.... MORE if they can't be replaced.

[The Big Ben]

I really want to see your project “Fly”. I’m disgusted by all the neigh Sayers. (Which by the way is the name of a local rock band)
good luck, Happy honkin'

I wouldn't call myself a naysayer. I just think a guy should think this kind of thing out completely to avoid turning something that works into a big pile of junk.

If a person has little experience in delicate metalwork, it might be a good idea to get some instruction. If a specifically brass instrument class is not available, the skills learned in a jewelry making class could useful.

[SplatterTone]

As long as we are being creative ...
Turn (or cast?) and drill some kind of polymer rod, perhaps?
Cedar does not expand in the presence of moisture. Don't know how well it slides or reacts to valve oil. Probably not too well.
Wood wrapped with brass sheet?