The page worked for me, but you can also try looking at the STLs their GitHub: https://github.com/ploopyco/thumb-trackball https://github.com/ploopyco/thumb-tra

The page worked for me, but you can also try looking at the STLs their GitHub: https://github.com/ploopyco/thumb-trackball https://github.com/ploopyco/thumb-trackball