Yeah, using that is something I considered too. But then I’d need to seriously cut down on the size of my firmware, because otherwise the trackball code wouldn’t fit. On the other hand, there is work underway to drastically reduce the firmware size… hmm.
Using one half of the Model01 to augment the trackball, or to provide buttons is an intriguing idea. I have not considered that… only the use of the pinouts to save on the controller. But what if all I had was a ball, and everything else was on the keyboard?
Thank you for this idea! A whole new world of opportunities opened now.