Hey Scott, good question about solo performances. I myself try to be very prepared and very cool we are headed in order to be in the proper mindset for a solo performance. Being able to achieve a level of calm and positivity is crucial and some of it can be done by practicing on the instrument but other parts of it have to be done by centering your spirit. I was given beta blockers a while back but I never actually tried them instead I worked on breathing and my headspace. Good luck