Look, as an older new clarinet student, I found the Etude ( a hook to rest the clarinet on my thumb with no pain on the rest of my arm as it happened when I started last year and my local teacher said when I complained: it hurts!. He said: Oh, I just had forgotten that in the beginning it really hurts!). So, fortunately, I discovered the Etude. I sound like a TV show, but this was so for me. I believe that many musicians to be, face a stage of body pain: guitarist the tip of the fingers, clarinetist, the elbow and forearm, harmonicist, lips, and tongue. Etc. (Those are my lifetime three instruments I have attempted to learn). So, the ETUDE, solves for clarinet pain.