Messaged you. On a grow that small, intake fans are pretty useless. Somewhere where air can get in is allllll you needed. Those small fans are lucky to be moving 10 true CFM, you can't get good circulation with wire caged fans, its why I suggested that 20 dollar inline booster. Caged fans move air, but its not focused and blowback happens. Best air movement for the money you could get, I had a 4x3x10 closet grow and didn't need any intake. 430watt light, 76-84 temps depending on weather. All I had was a 6 inch booster, I could have hooked up a box fan exhaust and got inferior results. If you placed an inline fan in the top of that box and cut slits around the top of the soil you'd have uniform intake and a jerry-rigged wind tunnel going on.
Air pressure works on the same principal as a straw, its actually pretty helpful to think of air as a liquid. The action you get in a straw is your mouth creating a negative pressure level inside the straw and the liquid compensates by forcing itself upwards. If you have a fairly well-sealed environment and introduce a fan exhausting air, the outside pressure forces more air inwards creating your intake. Passive air intake is plenty fine until you have a larger room devoted to growspace. That closet grow had a dryer baffle on the bottom and the fan next to the ceiling in the back. Fan was connected to ducting that expelled air out of the closet, you could see the door suction inwards as soon as the fan kicked on, air blowing pretty in through the bottom, moving upwards until its pulled out the top. If you wanted to move water in a specific direction, would you use a propeller in a loose cage? Or inside of a tube? Every fan used for heating/cooling is encased for a reason, it increases the efficiency of the fan many many times what the fan could do in open air.
It looks like you had two internode sets that were strong enough on the mis-topped plant. My first grow I mis-topped one like you did but the plant was considerably larger, lower two sets powered back and I ended up with 4. Congrats on the luck man, I see 8 as you do.