The Carl Fischer Senator tenor trombone, but who made this stencil??

[@CatsNCows]

Now, THAT is an interesting horn. It’s in amazing shape too. What’s the bore size?

[@ronzgarage]

​@@CatsNCows about .485. It gets airy starting at C above the staff. It has no air leaks however it barely has a venturi / lead pipe which is common with student level tbones. I may have one made because everything else seems worthy of a pro build.