I'm working towards live performance at some point, and I've been
banging around ideas in my head, and it'd be really nice to hear your
thoughts (both of you) on how you set up your systems.
Sure. The main thing that I did was simplify and take shortcuts in the interest of fast input; lots of emphasis on physical movement and none on graphical feedback.
I think I posted these links to this list before but I'm lazy so if I wrote/did something before I might as well link to it;