I have flexwatt for my rack, and though I understand how to attach the wiring, and how to install it in my other cages, I am a bit confuzzled as to how to install each mat on the shelves of the rack. The directions it came with say to route the wood for the rack, to make a tray the heat mat sits in, and then cover it with a piece of glass, stone, tile, etc. I constructed my rack out of melamine, so to route it, I would have to take it all apart, and try to route each shelf with my dremel (TON of work) I was under the impression I could just tape it down with foil tape... Obviously, I don't want to create a fire hazard. How best to ventilate it so the heat doesn't get trapped and start causing problems? Since this rack is in a pre-heated herp room, I only need minimal heat to create heat gradients in each bin on the rack.... The mats will be attached to a dimmer so I can adjust the wattage (and thus heat) output.