Prototypes printed in conductive and non-conductive filaments, so the touchscreen registers their rotation.
Some didn't work.
Most almost worked, which was worse.
Then the real work began:
Not whether it could work, but how it should feel.
Light-guiding acrylic material exploration.
Over 300 prototypes and material explorations
to find the shape which feels just right on your fingers.
Click-feel is software, not mechanics
a solenoid makes detents tune-able by context.
30 step volume knob and eight step fan-speed don't want to feel the same, so it seemed only polite to make sure they wouldn't.
Final prototype cockpit for semi-autonomous scenarios.