Links regarding system 22:

https://330mega.wordpress.com/2016/02/28/rave-racer-force-feedback-retrofit/

Transforming the Arcade cabinet into a USB-joystick so it can be used for other games:

https://blog.hamaluik.ca/posts/making-a-custom-teensy3-hid-joystick/

Github repo:

https://github.com/coon42/rave_racer