My 2 system DIY dry box with odor control

So I combined a couple if different box ideas I saw online. I took a plastic tubs and put an intake and outtake fan on each end. The fans are 120mm pc fans powered by usb. I bought the web absorber carbon filter and attached that to the back of the exhaust fan. I cut some wood rods to size and built a makeshift frame and stapled some screen mesh to it. I then wedged it inside towards the bottom of the box below the fans. I drilled 4 holes at the top of the box, two on each side. Then I took some twine and ran it through the holes for hanging. I also added some sticky back weather stripping to the top of the box to help seal the lid better. In addition, I used some clear silicone caulk around the fans to help seal them up.

Here are some pics. Let me know what you guys think. I should have used 80mm fans instead of 120mm. There a good amount of airflow so I'm think I'll have to maybe get a timer to run the fans for a few hours then off for a few.

Practical

I think I also sloved the too much air issue. I figure I can take a piece of paper cut some holes in it and tape it securely to the inside of the box/intake fan to limit the amount of airflow going into the box.