Dessicant box with fans

I have a very large dry box (like a 40 gallon kobalt storage tub with gasketed locking lid). I have several dessicant boxes placed in the corners, but didnt feel they're fully capable of keeping it dry, as large as it is. So I grabbed a couple old 92mm case fans and sketched up a dessicant box with mounting holes for the fans, so that it circulates air through the dessicant and around the box. 

I used 8- 8x3mm magnets to secure the lid, and it locks on quite well. The holes for the fan mounting screws are pretty tight- I didnt want the box to be wider than the fan which didnt leave a lot of room for a screwdriver, in fact i cracked a layer line tightening my last screw (it didnt break the model apart, so i just glued over the crack). The fans dont need all 4 screw holes populated, I only put 2 in each fan. 

I used an old 5v power supply to run these at low speed, melted a small hole and fished the wire through and then sealed around it with hot glue to keep the box air tight. The 12v fans run virtually silent on 5v and inside the box. 

Print settings I used: 
-PLA

-0.2mm layer

-15% infill

-No supports, but have lid facing up and box opening facing down. The overhangs and bridges are short enough that the print turned out well without any supports.

-brim recommended due to tall model