Euphonium Thumb Ring

When I started playing the euphonium, I had problems to hold it properly. Then I tried various belts but was not satisfied with them. So I designed this thumb ring. It will fit to a Jupiter JEP-570, at least to the one I bought 3 years ago. I know that this not cusomizable design will only help if you have the exact model. But as I'm very happy with it I wanted to share anyway. Maybe it inspires you to design your own version.