On the subject of fuel problems, a tiny tiny niggle: if the fuel runs completely out, no ISS in sight (or orbit), shouldn't
the APU die as well? Unless it has another fuel source? I saw something about hydrazine somewhere, but may have
hallucinated it!
Stunning job overall Dan!
PS: I'm a 'flicking switches that actually work' kind of guy... are there any other addons out there that could even
approach matching Dan's masterpiece??