So, I have been playing alto for three years, a 1938 FX Huller. Been coming along ok doing some altissimo and playing at church and with a jazz quartet. I bought a Reference 54 tenor one month ago. I am playing an Otto Link 6* mouthpiece and using Vandoren 2 to 2.5 reeds. Sometimes using their red box jazz reeds strength 2.5. I love the new saxophone but I am having persistent problems with discomfort at the inner aspect of my lower lip. Admittedly, I did sign up for a solo at church with a young lady singing in a key that puts me right at the top of the instrument's register quite a bit, even using the cool F# key several times. I am just starting to wonder, am I pushing things a little too hard? Getting the notes is no problem but after about 40min the embrochure starts to go and I have to lay off. Thoughts?