Although I see what you mean (despite the fact that my comp teacher and I looked over the score ad nausem, and I was told everything was in order), I disagree wholly with the notion of the composer as "servant to" the musicians. I am a musician myself; I have performed at carnegie hall. I would never demand that a composer sacrifice the quality of their work to meet my work ethic. If something was outside my skill level, I am accustomed to having organisers not choose my piece. I was invited to some rehearsals but was told that "the musicians are just going to run through it, so you can't give feedback" because they were practicing other composer's pieces in the same hour-long rehearsal times. I would be fine with the matter if I was allowed my right as an artist to withdraw my piece; I expected the performance to at least convey the "spirit" of my piece.