s-t-o-k-e-n-s: How big is Aperture? Portal poster Available for sale NOW! Part of my Video-game poster series that I made. Please don’t delete text. We do what me must because we can - Cave Johnson. Rest of my shop and more posters here!
Bottom of the main bus. I didn't bother with things like iron gears or copper wires as they're so quick to make I wanted to do them on the spot. Also notice the robo-ports -- not in use yet but they'll be helping ferry items around soon.