I see what you are saying and you make a valid point. The OP however, has not tested the hottest point in the enclosure yet. I am simply advising that they measure the hottest point in the cage and reset the thermostat accordingly. If they want to keep the probe there that is their decision. I don't have probes in all my tubs in my rack, I also have a reliable thermostat controlling the heat. I check temps a few times a week with a temp gun.