Thanks for all the advice definitely helps. Gonna hit up wal mart for those thermostats and also get matching hides with smaller openings.
As for his size he's between 1 and 2 ft, here's the pic of him in oversized hide:
Way too big I know.
As for the heat pad, I'll get a thermometer for it. It's the same one I was using for my bearded dragons a few years ago.
Also, how big should the openings be in comparison with him?