i secretly want to be able to connect the individual cps to any other projects i do kinda like interchangeable parts and the randomly protruding side would be like wat.
^--Perhaps this is a bit of a crazy idea.
The odd protruding side is easy to fix.
Put the corners on two of the sides:
-- White + Red + Orange + White
-- White + Light Blue + Blue + White
Two of the sides have no corners:
-- Yellow + Purple
-- Pink + Green
As long as you document and plan your patch panel pinout (try saying
that three times fast

) to allow for the quantity and variety of controls that you want to include, you'll be able to do swappable pedestals.
It will be a LOT more work, but it is doable.
You might be able to start with a 2-player pedestal system that you can use as a base for the eventual rear-projection Tank 8 build.
The only danger is that once it gets playable, progress will stop.

Personally, I think you're way overthinking the airflow. Rather than trying to create a bunch of fancy ductwork (which may or may not help), just a couple 120mm (or bigger) intake fans on one end, and vents on the remaining sides.
I agree that simple is better.
The advantage to isolating part of the pedestal is that for the same amount of fan noise, exhaust, and CFM (cubic feet per minute) rating, you'll get about 12.5 times the air flow if you're moving air through only 8 percent of the pedestal.
Compared to computers, projectors generate a lot more heat so the air flow is more critical.
Scott