Proper Ventilation for Grow Tent Question

First off I just want to say I don't care about odor control. I plan on growing some Aurora Indica from Nirvana in the Mother Keeper tent from HTG. My grow light is the Gen3 UFO LED Grow Light. My original idea was to use a 6'' inline duct fan (250 CFM) at the top or top side with a 4in inline fan (80 CFM) at the bottom, opposite to the the exhaust fan. Would this be troublesome at all? Below is a pic from HTG

If your only using led then they don't put out much heat I hear. Just a 4" extraction fan at top will do. Passive intake.

Thank you. Since the opening at the top is six inches, would a 6'' be too much or just use duct tape if there are any openings?

They should be draw string holes and up to 6" max. I would say anything over 4" be too much but check with a pro.

Thank you. Now I can place my orders.

i like to run the same cfm in the tent that im pulling out to keep the tent from sucking up from the neg pressure from the exhaust. i have a 2x4x7 tent for my veg and have a 6" fan pulling out and it sucks my tent in and draws down and heats up my fan pretty bad and i have x3 of those vent flaps on mine. i have to leave the side flap open to allow allot more air in to counter the neg pressure, so just some food for thought.