Nice ass build there BG !!
Plants are looking VERY healthy and happy.
Take a closer pic of the tops and upper internodes for possible sexing.
They LOOK female though.........at least that middle one.
Cut that excess ducting that's hanging out the back towards the floor.
That takes away from the fans cfm's too.
Cut it right as it finishes that 90 degree bend towards the floor.
Get some jet black panty hose as a screen/filter for the open end.
Very smart running it STRAIGHT out the tent though !!!
That one 90 degree bend will only slow down the exhaust a little (up to 30%).