Hi thanks for the comments Paul, Haris and Mariano.
Mariano, I didn't try appogiatura, learning the piece is already hard, in the future I will try it.
Haris, I agree with you in Vals I should make the notes last longer. In regards to the sound I am trying to play a bit louder so it is working but sometimes I forget it during my practice and I play softly. I need to remind myself to play louder to make it a habit.
Paul, you are right my slurs need a bit more work.
Haris, your recordings are very good. In exe 30 once you finish a slur, do not lift the finger but let it rest on the first string until you finish the four fingers, that's how delcamp does it.