From what I am reading you are going to be harvesting some very small premature buds, just my flowering cycle takes 11 weeks. I just don't see how you can cut that to 4 weeks and end up with a quality product.

Everthing else will work, one other thing, to get max veg growth go to 24/0, that is what I use for veg and cloaning, and I use 13/11 for flowering.