Thanks for the replies!
I take surface temps with a temp gun but I also have a digital on both ends of the enclosure.
I have 8 inches because http://www.savannahmonitor.net/ insists that they are burrowing animals and like to dig.
I'll try to get a pic when I get home.
My baby is very tiny. Perhaps only a little longer than my middle finger. I had read that they could be placed inside large enclosures but I was skeptical because I didn't want him to stress out inside such a large enclosure and, selfishly, I want to make sure he survives for a little while before I go through the process of building his adult home. I already have the plans (it would mimic my tegu enclosure). I just want to make sure he lasts past two weeks.
My tegu enclosure is 8 long x 4 deep x 3 height.
Would you still recommend 2ft at his size? Of course I would add more as he grew but I have the temps worked out perfectly (I believe so, anyway. Correct me if I'm wrong) and I hesitate to disturb that until I'm a bit more convinced he's healthy.
I've never had any issues with any of my pets before. I have beardies, uros, a tegu, snakes, and parrots. None of them have ever died on me.