hi, David Herrington here. Pro jazz trumpet/tuba for more than i'd like to admit. Euph player for the last 2 weeks, i bought a 1927ish Boosey compensator on E Bay. Probably too expensive but i needed it fast for a musical project here in Spain. If i didn't have one, someone else got the gig... I love it, but now the mouthpiece search starts. It came with a 4AM copy, which is great, but i get the impression that something bigger would be interesting. I'll check out your posts!