I'm looking at getting a turkey fryer to make the jump to all grain, and looking at the pot that comes with it, was starting to think about marking the inside of it to show how much wort is in it. I'm wondering about how much I will lose to evaporation as it boils. Has anybody marked their brew pots on the inside? I was considering using a sharpie to mark the gallon levels. I'm thinking this shouldn't have any real adverse effects on the brew, but wonder what you all think.