My Second grow attempt done right!

well this isnt my first grow experience but before i was always plagued by an empty wallet and half ass materials. this time i dropped a couple of g's and i think im pretty dialed but if anyone has suggestions feel free to post!
so here are a few pics to show what i got goin on.

Im running 600w mh for veg and 2 600w hps for flower, i run the co2 at 1500ppm and the ac keeps the room at 79 degrees while lights r on an 75 off. I am using subcools super soil for my flower and fox farm veg nutes. all plants r in smart pots(love these things!!!!) 3g for veg and then transplanted to 5g but i am working on getting myself cycled so i can just use the 5g from veg all the way through. lighting is all closed circuit ventilation so minimal heat enters my rooms from the light hoods.

So again any constructive criticism is welcomed!

just a little update put !0 ladies into flower today. I am not really using the scrog method but i did try a bit of trellis netting this time just to even out the canopy and provide support, i am over the sticks and ties!
these r 6 blue dreams and 3 bubba kush an 1 sour diesel.

So i am 3 weeks into flower now and things are really going great! I also threw in a few pics of the next gen... i will be starting with some new strains ,super lemon haze and Bubba/OG the bubba/og i got from oaksterdam and i cracked seeds from attitude for the lemon haze.

Im trying to figure out the flow of your ventalation system?? Please clarify for me... everything else looks sweet