Building my own rack. Few questions.

This is the rack I made for the exact same purposes. It is a "sideways rack" which means it can fit one 32qt tub sideways per shelf or two 15qt tubs normally.
http://farm4.static.flickr.com/3333/...3e472eff56.jpg
I had to imporvise a bit but I really liked how it turned out. Only cost me about $300 USD after putting everything in. Materials, flexwatt, thermostat, tubs, etc...

Eventually I want to put a storage drawer in the bottom space. Right now I am just using an empty tub as storage :P

Here is the link with more pictures: http://ball-pythons.net/forums/showthread.php?t=90564