Hey Briain - your girls are lookin like beasts! I just ordered a couple DP AWW seeds I hope mine turn out this well, it looks like there are just endless bud sites on yours!
I looked through the thread but didn't see it anywhere, what kind of nutes are using? Also, I think the perlite on top of the soil is a very interesting idea, I've even personally been thinking about adding something like hydroton on top of mine to help with even watering, have you noticed any extra value in adding the perlite on top (aside from helping with the gnats)?
Cheers and can't wait to see how these girls turn out!!