MX5 Cabin filter housing

My own take on a cabin filter housing for a Miata (NA in my case but should work on NB from what I know). I designed my own because I didn't want to get rid of the original “mesh” like many other designs do. My housing just snuggly sits over the original place and is fastened by some 3D printable screw for good measure. To join the pieces you'll need some M3 x D4 x L5 heat inserts and some M3 screws to match, around 8-10mm long but could be longer. As for the filter I tried using an M5 class one but it was too restrictive for the blowers so something less restrictive is needed. I ended up using only the less dense part of the M5 because I got so much of it.