
I'd like to future-proof it to fit any boards I pick up in the near future, so I'd like some opinions on what would be a good size.
I'm mostly interested in late 80s to mid 90s jamma boards. I only have a few jamma boards at the moment (Seibu boards) so I'm not sure if their size is typical. I may add some cartridge systems such as a single-slot MVS or Sega ST-V in the near future as well, so headroom for those is a good idea.
I'll also add some fans for air circulation, which should be easy since I already have a power supply hooked up to the supergun.