If it were my grow I'd give them a 3 week trim, take a lot of the lower shit off. As you see, they don't have a problem growing more.
Also... seems like your plants like it around 750. They might get a little more hungry round week 5 when they pack on the weight, but for now I'd keep it around that.
Oh, and also, FYI... I would give my girls nothing but water (and zone) for the last 2 weeks. Not saying it's the best way, just in my head it cut down on the stored nutes in the buds.... plus the plants would still be green by harvest, so seemed to me they didn't need any more.