I'm a highschool tuba player and I have a solo performance coming up in a couple days. Unfortunately, my tuba has been in the repair shop for over a month and I just got it back, less than a week before my performance. (I've been using a school owned instrument during that time). As such I have not grasped my solo on my horn.
I am playing a three movement piece and two of the movements I can play on my horn, but one movement I can't. Is it fine to switch horns between movements of a solo piece?