Go to this link. (first link) It is of a 10 tub rack using CMBL. The second link is my 5 rack that I also used CMBL tubs. Just a quick example of two different ways to do it. Its all pretty self expainitory. To space use 2-3 CD's.(for the air gap, and ability to push in tub)

It is made from partical board with a melamine coat. Home depot
And screws home depot

http://ball-pythons.net/forums/showthread.php?t=90455

http://ball-pythons.net/forums/showthread.php?t=87743