I have a question. Last week, I got a new thermostat, and realized how much heat I was loosing by having too much newspaper as the substrate. Some of you may remember that I had a temp of 122 under the paper to achieve a temp of 94 on top of it. That being learned, I had a thought last night. If I owned a UTH that was as big as the bottom of my enclosure, why couldn't I adjust the amount of paper on the inside to achieve the perfect thermal gradient? I am certainly impressed by the consistent temps that the T-stat is delivering, and don't know why I couldn't have one sheet of newspaper on the hot end to get my 92-94 degrees and 15 pieces of newspaper on the cool end to get 82-84 degrees. I think that I have enough other stuff in the tub to keep him from getting under the paper; rocks, logs, plastic greens (even though I realize it still may be possible). BTW, I do own a UTH almost the exact same length as my tub. Is this plausible? If not, tell me why?