Which PT models do you use or recommend for solo and quintet playing?
I am still establishing my doubling technique on tuba and have reached the point where I suspect a smaller mouthpiece could give my sound more life (focus, zip, resonance) in the registers normally used in solo/quintet playing. I am using a PT-88 as my only mouthpiece on two CC horns, a Conn 52J and Miraphone 184. I really like the comfortable rim and would gladly buy another PT mouthpiece.
Range and endurance are not issues using the PT-88, just timbre and focus.
Even though everybody is different, I'm hoping to see if there is a consensus on a good starting point in the search for a mouthpiece that suits my needs.
Anybody think I should stick to the 88 and learn how to make it go? (Is it primarily used for meat-and-potatoes playing?)

Thanks in advance for your suggestions.