thanks Wofi, but I have no idea what you are talking about.Cussion of air, you mean air cusion

Did you study for this peice for perfomance exams?? I did this in 2006. But this is a better version that I did when I did my exams with a better recording rigs ....
About missing notes,,heeee we all do that

. I played all notes but not pressing hard enough..

I think it is easier to say than done.
Not only that, I might get my own composition played one day and you can give a good critic which I won one of the music comp in Australia. Search on Youtube see if you can find "pastrole" played by Riona.
Sorry its not your cup of tea. This is just my interpretation I do what I have now.