I stirred mine a little bit - for me it's like cooking anything, and if one does not stir then the parts on the edge will cook more than what is in the middle. I didn't stand there stirring like mad, but just from time to time mixed it through and left it again.
Pirate - to superfat afterwards there are a number of options. As it's usually done to ensure that a particular oil or butter is the majority of the superfat, I would calculate my recipe without this extra stuff but with a superfat of 3% - this gives me room for errors with the measuring and ensures all of my lye is used in the cooking process. I would then add my superfat product after the gel phase and would use it at about 5% of the weight of oils already in there.
Pirate - to superfat afterwards there are a number of options. As it's usually done to ensure that a particular oil or butter is the majority of the superfat, I would calculate my recipe without this extra stuff but with a superfat of 3% - this gives me room for errors with the measuring and ensures all of my lye is used in the cooking process. I would then add my superfat product after the gel phase and would use it at about 5% of the weight of oils already in there.