@langer and I built this last year, and I decided to take pics of it and edit them just because. For anyone who wants to know, the gubbins inside are a power strip (for powering the monitor, Raspberry Pi, and speaker), a speaker (which we removed due to it not being able to be heard in the pits), a Raspberry Pi 3, with a 16 or 32GB MicroSD Card running RetroPie, and some custom drivers), and a random monitor.