Corsi-Rosenthal Filter Brackets (for five 20x20x2 filters)

I wanted to build a corsi-rosenthal filter that was a bit more robust than a bunch of taped together filters so designed these corner brackets to hold the filters together. 

It still uses tape on the inside to seal up the edges. 

You'll need to remove the inside (intake side) fan cage to mount to the brackets via four heat-set inserts to mount it to the fan. 

Tension the brackets together with some simple paracord through the u-holes.