The trackball that merges pointing and 3D control

Creator here - yes, it's a mod of a Kensington SlimBlade Pro, mentioned on the site. Rotatrix is the hardware mod (added controller), firmware, and software stack that extracts 3DOF rotation and integrates into CAD and other apps. It's possible with firmware, but you need a trackball with dual optical sensors to do this (which very few have), and the system is patent pending. More on the architecture in the earlier Show HN: https://news.ycombinator.com/item?id=46990422

Thanks for taking a look.