Yea brotha, thats what I'm talking about! Looking great!
I wouldn't stress the yellowing too much. You could give them a couple dose's of N throughout the 3rd and 4th week of flowering "at least thats what I've been doing if they need it and I'm going off the foxfarms chart for soil."
Some people will jsut let the leaves yellow and die off which will happen towards the end anyway but it doesn't hurt to give them a little N in the middle of flowering to keep them that much more healthy.. Just keep doing what your doing, what week are you at now? Looks about half way there if I had to guess, maybe a little closer..
+++REEPP!!