These last few weeks, I have been playing my Selmer Super Balanced Action alto, serial number 44***, a lot. I love its sound and ergonomics. My only concern, though is the fact that the middle D is very sharp, and the middle D# - F# to a lesser extent. I compared this to my trusted old Couesnon Monopole II, serial number 17***, which plays in tune without the need to change my embouchure. Is this middle D issue something that can be adjusted by a good technician, or must I accept it and practice more?