You’re not wrong, I abandoned the he project to keep up with the change in his symptoms.

On a basic level I took apart a USB laser mouse, $20 Logitech, and extended the connections of the left and right clicks with a bit of 22 gauge wire. The sensor was flipped up and with a smooth slipper would act as a mouse pad mimicking the motion of movement.

Back in 2010 there wasn’t much on the market that was affordable. The best I saw was a roller ball that could be manipulated with the tongue. Now you can get a foot mouse for $80, but back then the cheapest I could find was $250