A few days ago when my daughter was performing a cello solo at a contest I was reminded of a remedy I had heard about once before. Her music coach told her to eat a banana about a half hour before her performance. It is supposed to reduce the shakes. Whether it is the potassium, the beta blockers, sugars, or what, I don't know. I took a banana to my match the next day and about 20 minutes after I ate it I shot my two best stages and felt very calm and steady for each one at the start. You might try it. I will be taking a banana to every match from now on!