I noticed this time that the 'big-ass slicing laser' reminded me of how Shadow ships blew up things. Funny how you spot things on repeat viewings you never really took in the first time. :-p

Hmm... perhaps the original builders observed the Shadows and managed to reverse engineer their tech. That could explain why the Great Machine is *five miles down*. Paranoia, or having a good reason to remain as hidden as possible...

Now, how could you doubt Vorlon tech as not being safe... Vorlons are angelic, you know. :-p