What I want to do is build a thermostatically controlled shelf which will accomodate multiple enclosures(I'm keeping T's). I haven't actually planned out the logistics yet and would really appreciate some opinions. I imagined it as essentially a large book case like structure with a fair amount of depth to it and a swing out glass front for each seperate shelf or level. Has anyone ever built something like this? I am trying to figure out ways for it to be well insulated, yet easily broken down into smaller components, perhaps each shelf (i guess there would be four or five) could release on its own. Also, I really need opinions on how to heat this thing, i.e. heat coils, large heat mats (does zoo med or some similar company make heat mats that are like 3'x6'). I'd like to avoid space heaters as I feel like they are a fire hazard and I don't live alone, otherwise I would feel comfortable just being insured. I know you can purchase thermostats that will monitor a heat source and shut it off at the proper time. How reliable are these? Also a plus would be a heat gradient of about 5-10 degrees between the top and bottom of the structure, though that may end up being a natural consequence of the height. Anyway, anyone who has done this or anything remotely similar please share all info and plans concerning, and anyone who hasn't throw in your two cents anyway. Thanks.