Not sure how slick the cooling system was/is, it's a bit hackish as it seems that many addons were for the Macs prior to the SE.

Here's some more pics: sadly, I wish it were a happy ending with the Radius card in place, but it must have been pulled.

You can see the rubber bumpers on the chips on the logic board, and also rubber bumpers on the underside of the metal chassis. The fan has an additional metal bracket to mount to the frame.

The fan wasn't hooked up, but it has a two-prong jumper like connector, and you can see another connector coming from the power connector - I suspect there must have been power passing through the card. The paper baffle is pictured here too.

The fan mount used two screws to attach itself through the coin-sied holes in the back of the metal chassis.

I think I'm going to keep the paper and fan out of the system now just to clear the airflow, but I guess I can always ad it back and power it if it has heat problems.