I posted this reply in this topic a few years ago -
I got off the bike each descent after the Box Hill climb. Even though it’s only 3 or so minutes, it was good to walk around a bit and refill the water bottle.
I took a break after 4 laps, then after another 3 laps, and then just before the 10th climb of Box Hill.
I ate 2 PB&J sandwitches, one Cliff bar, 2 bottles of sports drink, 2 small Cokes, and a couple of Pickle Juice shots.
After I finished, I drank a Muscle Milk, and used a massage roller on my quads. I was sore that evening, but felt really good the next day.
Good luck!