The author remixed this model.
I commented on the original Teaching Tech Spacemouse video that the reason it was so large was because all the joysticks had to be housed inside the control knob and I wondered if it was possible to move them to the outside.
I started this design a couple of days later, to see if I could design something based on my comments. A few days after that Teaching Tech release version 2. I thought about abandoning this project but decided to continue. It is a complete redesign of the 3D printed parts of the model but the wiring and the code remain unchanged.