Grabber
Gantry
Arm extender
Eyeballs
Book recognition
Eyes… and the software that drives them. If I can’t ID books, I’ll need to come with a different solution, and that might dictate the geometries involved. Also, book identification is kinda job numero uno, as it’ll provide the most usefulness if the project fails.
Grabber, similarly, geometry and mass are key and might fluctuate with changing methods. Also, the grabber can function stand-alone like the eyes.
Carriage (and gantry) because really, they’re attached at the (hips?). I’ll probably want to do some testing of the arm extender while I’m there.