Rudy Meinl 4/4 F Tuba MP Recommendations

[lowtones425]

Hey Tubenet...

For many years, I've played a 4/4 Rudy Meinl F Tuba (IYKYK), with a Breslmair F3 mouthpiece.

I'm looking to make a change, as lately the Breslmair has been a wee bit too physically incompatible with my facial structure (it's a bit painful to play, think too hard rim) and I'm open to getting a completely new MP.

Any ideas?

Specifically, has anyone played the Yamaha Sergio Carolino mouthpiece with a rotor F?

Thanks in advance, all.