Curling could be from too much direct light or the fact you`re overwatering with 4-5 days. These plants don`t need to be watered so often... Try a small dose of cal/mag next watering....
My first grow i had seeds that i brought in from St Johns. It was a Jamaican strain. I babied them way to much and twice they almost died. Somehow, they were tough enough to survive and my lessons were learned... I only wish i cloned those babies..:-)The point is, nobody is perfect in this...
The first grow for me was horrific. I made every mistake in the book...LOL. I think we all do... I don`t think there`s a right or wrong way to do a grow. I agree with you, asking those who have experience does save time.. As for his NUTE mistake. I think the Grower has learned and will be more...