Ive discovered i have a leak... its to do with middle C , when i press that down the little pad nearer the top dosnt seal down properly, there is a gap for air to come out how do i fix a leak
With your level of experience I think you'll need the services of a technician or at the very least an experienced player with some technical skills. When the regulation goes out through wear and tear or a little knock, fixing one leak can cause other problems. take it to some one who knoes what they're doing.