The Anova ran for over 36 hours non- stop and the stick is just warm, not hot at all. On the other hand, the Cambro is almost as hot as the temperature I set.. ..I didn't cut a 3 1/4 hole as suggested but I cut it to measure and I cut out a little square piece in the back to fit the flange. The lid was pretty easy to cut, you just need a really good pair of scissors. I used a rotary tool kit (dremel) to smooth out the edges. It is pretty air tight.