I dunno were not scientists. But when you have a jack Daniels can you taste the ethanol? nope. With our first batch we could, you could smell it too, it was drinkable but rough.
This batch is smooth and has an almost fruity aroma.
24 hrs before distillation we add a product called Turbo clear which removes gases and impurities from the wash. And yes, you have to monitor the temp during distillation constantly (between 55 and 60 degrees) I assume that this has more to do with quality than the final filtration but as I say, we're just beginners, Alan would be able to tell you haw it all works probably.