Make farts and oxygen agent b more accessible

[Lefinch]

really appreciate this! Those all make sense, god knows how anyone finds space in Atlas' engine cabin to put anything.
It's a real bodge and I'm happy if it feels like it's too inconsistent but donut 2: I argue a case for actually putting a can in gas storage.

cons:
- Inconsistent with everywhere else.
- Just inverts the problem for toxins.
- It makes me long/tremble in fear of a fart storage tank.

Pro:
- Shuttle rides
- Plenty of space in gas storage
- look okay I just like gas storage.