Haha, that is sooo scary! Guess what I (literally) right now was shopping for? An E Stop switch! Thats really good of you. Cheers :beer:.
Of course you don't have to if you don't want to, but could I get the water pump as well :D.
Edit: Also bought myself 2 fuse boxes, holding 4 fuses each. Got it off the 'bay. Figured I could have one box fusing the PSUs and another fusing the drives.