As is common for a lot of instruments from the saxophone family, the upper register (notes played with the octave key pressed) on mine is a bit high (by about 10-15 cents). I practise a lot with a tuner to make sure that everything is within range. I have recently discovered that I can fix the misalignment by simply changing airflow direction: if I blow downwards by about 15 degrees as opposed to blowing straight whenever I play a note requiring the octave key, the 10-15 cents sharpness goes away.
What I am curious about is whether it is a good practice that I should adhere to. I am making no embouchure changes whatsoever, simply changing the airflow's direction. How does it fare in the long run? If I change instruments, if I use a different instrument from the saxophone family?