That's too bad.

The github[0] for it is kinda cool. Uses the 'CERN Open Hardware Licence Version 2 - Strongly Reciprocal'. The assembly instructions[1] give a bit of a hands on feel.

They had some more details on a reddit post[2] it looks like.

[0]:https://github.com/ploopyco/aplus-trackball

[1]:https://github.com/ploopyco/aplus-trackball/blob/main/docs/a...

[2]:https://www.reddit.com/r/ploopy/comments/1vo4y4r/this_is_the...