I did consider that for a while, there’s plenty of room in the casing – however, I decided against it for several reasons, primarily because I’ve made the (possibly foolish) decision to support a lot of original controllers*, so the circuitry to switch between them takes up almost all of my GPIO pins, and the remaining ones are devoted to a power switch and converting the Playstation’s reset button into a ‘return to menu’ button.

*Yeah, I know you can get USB replicas. But it feels like it’d be cheating, somehow.