If I were you, I wouldn't worry too much about that lower growth yellowing. I noticed mine did that too, which was fine with me because I usually lollipop the bottom third of the plant after about a week of flowering. Most of that lower growth won't produce viable smoke, and the energy is better spent fattening up the higher buds that receive more light.

I would consider thinning those out some, either by lollipopping the bottoms, or trimming back some branches. They look healthy and happy tho. Happy growing.

BTW, the high was great, and most of the top colas weighed in over an ounce a piece, and that was in organic soil.