Made these pieces the last two days:
Drilled holes in the circuit board - this means I can start soldering things to it now.
Polished the edges of some of the Plexiglas walls (it still has the protective cover on it). I made the holes too small at first so I went back and redid them.
Before and after:
Lasercut the gas sensor base. As you can see, the cutting is off so I will have to redo this. It's actually still usable, but laser cutting is fast so it's not a huge problem to remake this.