There is something I dont understand. You take the whole radiator and cover it then put 2 smaller holes in the cover plate, how does that work to cool all the fins when only the 2 holes pull the air through?

If it is only 3/8 or 1/2" off the fins, wouldnt it restrict the fins that are actually getting air flow.

In the picture there is more room between the fins and the fans, almost a plentum of sorts.

Please explain

thanks -M