I bought a new Vandoren A45 to try, and I really liked the sound and performance. That is, until I discovered that it made all the bell tones sharp. C# through Bb, all of them a half-semitone sharp. I had to drop my jaw dramatically to get them near pitch. I switched horns and other aspects and same thing. Went back to the Meyer and other mouthpieces, no pitch issues with the bell tones at all. Weird.