Steve, you are a troublemaker!
Replies from all around the world, and yet no one mentions power line conditioners/regenerators/esoteric crystals.
My only comment for Speco is that I'm surprised that there's not more blank rack spaces between equipment. I do see the large fan at the top of the rack, but usually even with processing gear I throw a blank rack space in, as many of the units' top covers get pretty warm when used normally. Is forced air behind the equipment enough to cool everything?