My 10300 is a disaster. I have attached the thermometer probe to the lid, hanging down at about top of egg height. I am calibrating with multiple reliable thermometers, which I always have to anyway. Hoping it helps with the variability of the probe moving around on the turner. This will be my last attempt to make the 10300 work. I will get a brinsea40 and sell the 10300. Although I will feel bad selling this nightmare to another. We will see what happens. Plan to set 40 eggs tonight.