Also, 120mm fans are pretty darn quiet, I think you're wasting space and costing airflow with all of those baffles.
And your baffles do absolutely zilch if you're putting fans on the outside of the case.... It's like taping earplugs to the backside of a computer speaker. Ditch the outer fans if you want to keep your silly baffles.
I'm getting the impression that you're just throwing random designs you've seen from actually engineered designs together.