Over a month, when Jamil attempted to clone DFH 120 on the "can you brew it?" podcast. That beer requires a ton of daily supplemental sugar additions in the primary. That doesn't include the diacetyl rest, just pure primary fermentation.
Beer so good, it's frightening.
2014: Seven Heavens Series One: Vilon, Mystic Melomel, Skeeter Pee.