Im having trouble remembering since Ive been gone awhile, what kind of music do you play? Hard Rubber bergs In my expirience have had smaller shanks, as well as some Runyon models, and they both have the added benefit of being great matches for Conns Another thing to consider is the discrepancy within models even, the bore of the shank is not as uniform as we'd like it to be, so try a few and see what you come up with!

Talk to a different tech. Unless you have a neck from an instrument other than a tenor sax any tenor sax mouthpiece should be usable.My first sax was a 16M and used a Selmer D, stock Berg Larsen 110/1 and Link 7* on it without problems. I've never heard of needing a custom piece for a student instrument.