Now once you are at a boil, why not just turn off the heatstick, remove it, and use your adjustable stovetop to control the boil? Can't you maintain a boil with the range?
So I am tempted to substitute a portion of that flour with spent grains from a Partial Mash run. I will start rinsing and refrigerating them. I found a dog treat recipe but I love the idea of using yeast and grain from a brew for food!