So this is going to be a really stupid question. But are the fingerings the same on a Bb rotary as they are on a Bb piston? I'm considering playing part of my juries piece on a rotary Bb from our studio, but after playing it, the correct pitches aren't coming out when I use Bb piston fingerings. My mouthpieces are cut slightly smaller to fit correctly into a schilke horn, but I don't think that would be the culprit. Any help is appreciated.