I recently acquired a fairly new Selmer Serie III replacing my Serie I that I had for about 20 years. I'm having problems with the altissimo G3 on the new sax. I could always play it on the old sax althought it was the weakest altissimo note I would play. I use the same fingerings and the same mouthpieces as with the Series I: a Ponzol M2, a Berg 130/0, and sometimes a Dukoff D7. I don't play alot of altissimo, usually to F4, but not being able to get the first G 90% of the time is frustrating. What am I doing wrong?