I did purchase a full size b flat cool wind tuba, I personally am glad I did. First of all the reason I did was because of my back injury, it was very difficult to carry my brass tuba around. What I I found out one has to oil the valves real well so they do not click and use a Philips screw driver ...

as anyone ever used Charles Collins - Advanced Lip Flexibilities.for trombone but down an octave for tuba. In combination with william bell's daily routine? to help build ones range in multiple octaves.