Please help! I love the Jet tone small shank mouthpiece, but I am needing a larger trombone for orchestral playing. I have found a Courtois medium bore instrument that I could buy and it should fit my small shank mouthpiece - but will it have as good a sound as the larger bore instruments? Does anybody have experience with medium bore trombones in an orchestral setting? I could really use some advice as it's quite difficult to get instruments to take away and try in little old NZ and I really want to make an informed decision rather than spending a bunch of Money on an instrument that won't quite be right for the job.. Thanks!