Toilet paper and cardboard boxes literally right against stacks of potential ignition sources, A++ would ignite again.
Those multiplugs are a fire hazard if you're not careful how much you load onto them. I'd check how warm the cables feel.
Cables are very cold none of my cables run hot, today I will split up the rig and yes cable tie the shit out of those messy atx wires aha.
Also looking to mount everything in a spare server rack, Cheers