Guys guys guys...
my advise here is to think about the money Sony and or Xbox spent on the design of their consoles.
They would have had everything covered when it comes to Airflow the problem was the people that chose the solder.
Now the issue is going to happen one day or another but the trick here is reducing the Ambient temp not the airflow in the console, you start chopping in there and static pressure is out the window and parts that had airflow will not longer have it.
Most people have these machines in a TV unit, if so, wood on the front and the back, and add some 120mm fans, this will reduce the ambient which in-turn will reduce the temps inside the case.
But none of this will save you if you have already had the solder start to flow, it will create dead shorts that will heat up other areas and no amount of airflow will save that.