For me, a UTH has not been enough to heat the entire enclosure. I need a CHE to manage temperatures throughout the day.

Keep in mind where these snakes are from. Meridian areas in Africa. Probably 95% of us in the US and Europe are not in these areas so we need heat with other considerations to duplicate the environment they are bred for. In many generations of breeding they may need something different, but I think we are a long way off from changing their DNA regarding heat.