synthetic washers for older Edgware St. 4-comp tubas

[sloan]

So offer synthetic valve caps, then.

Or offer synthetic (or gen-u-wine) stem extenders so owners can install synthetic washers.

Or, better yet, sell entirely new sets of "WILLISTEMS" for the millions of such tubas that people are playing.

Then send me 37% of project-related revenue for this amazing advice.

You missed the best idea - custom valve BUTTONS. [I'll settle for 35%]

[Art Hovey]

It's not difficult to find a brass nut that fits the thread of your valve cap and file it down to match the cylindrical shape of your valve stem. Or if you have a small lathe you can drill out a brass rod and tap the hole. Either way you get a small extension on your valve stem that can be made in any length that you need to make room for the washer that you need under your valve cap. Even I can do it.