Good morning, Rodney! I am the one who is grateful for the opportunity to read Albert's book! Yes! I really trust the exercises by the French professor Charles Louis Hanon. They were originally written for piano, with the goal of developing finger speed. However, most of the great accordion teachers have written books adapting Hanon's exercises for the accordion, but each accordionist has adapted the left hand in different ways... (that's why I created this topic). I believe you can also play it on the clarinet without any problems, but since you have arthritis, take it easy on the speed... A golden rule: if you feel pain, stop immediately! Rest. When the pain goes away, go back to practicing the exercise more slowly (each person has their own speed limit). I can send you the original version of Hanon's exercises for piano or adapted for accordion. In my opinion, the best version for accordion is by the Argentine professor Enzo Gesualdo, the only drawback is that the text is in Spanish... But with Google Translate everything can be solved. If you are interested in this book, send me an email and I will send it to you. My email:
felipe.ventura88@hotmail.com