Thanks to all who replied so far. Maybe you guys can help me out a bit more. I would like to order a custom mouthpiece from Bach (yes, the 1-1/2C with 3.8mm throat and 24 backbore). Do you know what number throat is the 3.8mm (could it be the 24?)? I've switched back to my old 1-1/2C, which I had drilled out to a 3.8mm throat. Really felt like home again. So, the feeling is right, now for a bit of improvement on the sound. That's where I think the 24 backbore would help me. For some reason the drilled out one gives me the feeling my lips have a little bit more room then(e/a? sorry) the standard one. Is that only because of resistance difference, or just because of the machines not producing identical copies? A lot of questions for a pro guy, or what? Now for the practical part: where do I order my mouthpiece? I checked out the Bach website, but couldn't find a link to order such a special item. Any thoughts? Thanks for your input, Jeroen.