About 6 years ago, I created a soprano recorder brace out of a plastic thumb rest, a wooden dowel, a screw, some glue, and some foam. I use this brace today and I made one for my alto recorder, as well. They are not fancy, but they work.
After dreaming about doing this for ages, I finally designed a brace that can be 3D printed!
I used Tinkercad, a free, online platform for 3D design. The program is easy to use; even without a background in engineering, I quickly learned how to create, resize, align, and group shapes. Try it yourself!
The engineering teacher at my school helped me print a few test pieces once my Tinkercad files were completed. I designed one that is the same size as my original and a smaller one for elementary students. Both of these designs are now available as open source files on Thingiverse. Please share them with anyone who might benefit from them!