I think your construct could be improved by adding ducts to the outlet so the heat isn't getting trapped inside the construct. Some of it will be recirculating. (I only watched the last video).

I'm aware that air needs to get in and out of the box. Anyone who puts their ASIC in a seal box is dumbass!

MDF isn't that good; it's just easy to work with and better than nothing.

I'll look into using a fireblanket inside the box though. Thanks.