Bro... Your plant is getting rootbound! You see that overcrowding at the bottom when you show your roots? First off, I would never recommend pulling your plant out like that(of course unless it's a dire need to flush or transplant)... It really disrupts it's growth and can cause unnecessary problems... With that said, I would recommend transplanting into a bigger pot... You don;t have to, but it will severely decrease your growth and over all yield if you don't..
Another thing I noticed, was you don't have any "light traps" around your intakes/exhausts... So.... When it's time for dark period... Light can still get threw those "vents" thus, possibly causing hermies..
Also, yes you are trying to disprove Hemp Goddesses advice by simply showing how well your plants are doing... With all do respect, that doesn't prove anything... Sure, they may look great, but do you have any idea how much better and bigger it'd be if you took this advice? Rather than be-little it and come across like you are more aware than the people here trying to help you.. Hemp goddes is right, those fans are horse crap! However, they will still work to an "EXTENT" sure, better than not having any fans, but not nearly as efficient... If you want to post your grow here, expect to get constructive criticisms and learn how to take it.. With that said, Good luck to ya bro..Also, I believe it's spelled "cardboard".