Haven't had a look at the belly yet, I'll check tomorrow after he's digested a bit. I do have a heat lamp suspended a few inches about the cage top. It's possible that he could get that part of his body up there, but it would be odd. I don't use a thermostat but instead use a digital thermometer that keeps track of the highs and lows throughout the day; today's hi being 90 and the low 75. Here's a picture of the enclosure. He typically spends the majority of his time in the cool hide to the right.
Thank you. I'll continue to monitor it.