I will answer to what is in bold
Here is what happen when you do not use a thermostat https://ball-pythons.net/forums/show...highlight=burn - https://ball-pythons.net/forums/show...ght=belly+burn - https://ball-pythons.net/forums/show...ght=belly+burn (those are only a few example of what we see every year on this forum) , a thermostat is not a optional gadget it is something you MUST have no matter where you live. If you have a UTH you MUST have a thermostat and a reliable one.
Analog gauges are completely unreliable so discard those and use a temp gun.
If your BP is very active during the day then something tells me that your husbandry is off, whether it's the hides not providing enough security, the enclosure be to big or your temps.