Does such a book exist, that is to say, written specifically to be practiced on the C trumpet? Obviously when one practices the front part of the Arban book or the Schlossberg daily drills on the C, he does so for chop building and technique, and he isn't concerned about what key Arban may have intended. But as we get towards the back of the book, what do you do about Arban's Characteristic Studies? Play them as written, or transpose down a whole tone to comply with the original key? Cafarelli and Sachse are a no brainer (HA!) in that you just transpose them to all the indicated keys no matter which horn you have in your hands, but what about you yourself, Manny? You who are primarily a C trumpet player these days. If you say to yourself: I am really in the mood to play some Charlier #2, and you want to play it on your main trumpet, the C trumpet, would your first note be a Concert F natural, or a Concert Eb? When playing etudes on your C trumpet, does your integrity lean towards the original intent of the key, or towards the fingerings and dexterities that Arban (or whomever) may have had in mind?