I took a listen and I really like your piece. You have soom real musical talent Daniel. You have some nice uses of harmony too. very late classical in my opinion. The only concern I found in my opinion was the orchestra and solo violin. It seems to be over powered at some points in the piece. That was my only concern. Overall, very well done.:D
I agree with you on that Daniel, Mozart does use these notes. For example if you listen to the overture of La Clamenza di Tito, or examine the score, Mozart has the 1st violins reaching high D sharps, and Fs and he works those notes very well.