I am playing second trumpet on Mozart Requiem. I rarely get a chance to play my D trumpet so I want to play it on this. The hole thing is written for D trumpet except one movement is for B flat. I can do the whole thing on C trumpet but then I'm playing a lot of low D and A. I didn't want to bring two horns out with me so I think what I'm going to do is play everything on D and not play the 4 notes that are too low for the trumpet or I'll play them up an octave. What do you guys do?