Over the past year or so I have wrestled with the fact that my dynamic range is not what it should be. mf,f,ff,fff were no problem. I really had a hard time playing softly with a good tone. Sometimes the tone would shut down altogether. There were comments from section mates and my teacher that finally got me to put an honest effort towards playing softly. On the days that I remember to concentrate on soft playing my upper register works the best. My problem is that I don't always remember what works and I take steps in the wrong direction. I have not completely studied Cat's method. I know little about it other than the 20 minute G. What I have experienced is that when things are working above high c it feels no different than when I am playing a G on the staff at the lowest possible dynamic level. Who is to say if that is true? I may be doing something differently and not even know it. Regardless of high notes I am gaining new colors in my palette to paint with. The high notes will be a consolation prize.