I just finished the ventilation system and thought it was time for some new pics.
I found a couple of aircraft vents mis-listed on eBay, for cheap. I replaced the gaskets and felt washers (which were rotted), cleaned up the inner iris ring, and re-painted them. Then, riveted them to a couple of steel plates and mounted them to the front of the pit's frame.
The fan is a 10" AC fan in a MDF enclosure, with PVC fittings and 2" hose running back to the vents. The whole thing sits underneath the monitor deck, on the front electronics cabinet.
