We did Epic endgame day 1 - pretty tough (got nowhere near 100 squats! Maybe 60?). I will do something tomorrow, not necessarily day two, as not sure husband will want to workout tomorrow, as he has a long day at work first.
Weights wise, you just need to do as much as you can - I have sh*te knees, so generally use either 7.5kg or sometimes 10kg for legs. For upper body, generally 10kg chest press (although I can go heavier, but the rest of the weights are out in the shed!), And then 5 or 6.5 for the rest of the stuff. I've definitely improved the look of my body since starting CG, despite not using as heavy weights as I used to when I went to the gym. And the only way to get that muscle definition, and lean look is to lose fat - so you can eat carbs, but just cut calories a bit for a while.