check the NPK on your soil. it looks like you have way to much K in there, hence the yellowing of the leaves. and careful not to over-water, you don't want root rot, especially at that stage. good luck though man.
put some air flow through the plants. it will make your stocks A LOT thicker and stronger and you will get more bud. simulate wind but not to strong ha but other than that man, shit looks amazing =]
sounds like you are doing just fine. just watch the temp when the lights are, 86 is pushing it. try to get it more around 78-81. but other than that, sounds good. you should put up some pics yo =D