I received the Avantco IC3500 as a Christmas gift and brewed on it today. I also test boiled 2 gallons of water yesterday just to get an idea of how long it would take. My pot is an 8G Megapot 1.2. The IC3500 has 2 circles and it seems to me that heat is only generated within the smaller circle no matter what power setting I use. I am basing this on where I observed bubbling taking place. Is this normal? Or should the heat be more even over the bottom of my pot?