@TheRealSmilebit Ok, and just one more question, what holesaw size did you use for the trackball? (2 1/8 inch?)

Thanks!

Regarding your question about the coin door. could be a bad microswitch. do you have access to a multimeter? you could check the resistance from open to close. Any pics on how you have the coin door wired? Are you sure that you wired correctly to the button. Needs to be wired to the open close. On your buttons it should be the posts that are offset from one another and are on risers

Theoretically it should be possible. The trackball should replicate a mouse and if ES could translate trackball/mouse inputs as joystick/keyboard inputs then it should be theoretically possible. I haven't tried this nor am I involved in development here, but this would be cool functionality. Right now you could get around this with a little USB control pad that is only used for ES, but I understand this isn't a long term solution. I'm not sure if this is the right place to suggest modifications to EmulationStation, but perhaps specific workaround code could be developed similar to the "xarcade2joystick" (or whatever it's called) functionality. This would be cool nonetheless.