Here are some pics of the enclosures I'm building right now. They measure 4 x 2 x 2:
I do things a little differently, in that there is only 1 foot of glass space - the litter dam and top lip are 6 inches each. This saves a TON of money on glass, but still gives me enough room to manouver boas or whatever else I put in there.
Still to come is the glass tracks, glass, electrical, and a vent or two. I'm in the process of siliconing the joints right now.
Thanks for looking.