My son plays 1st cornet in a 4th section band. His band cornet came with a 2B mouthpiece but I was wondering if he might be better suited with something like a 4B. He finds a G 1.5 octaves above middle C is about as high as he can comfortably go, and I wondered if a 4B might make it a bit easier to get slightly higher. I know more practise would be likely to help, but with A levels and Grade 8 piano in progress the cornet is most often played at band rehearsals and a little bit during the week, and I'm interested in seeing if a slightly different mouthpiece might help.