Small wind tunnel

This is my design of a small wind tunnel, I made a slot for plexiglass or acrylic in the top so you can slide it in and out to replace the item inside. There is a small slot for a car wheel and a hole on top for a flashlight. The air straightener is andr3wyong's Honeycomb Flow Straightener Mesh for 120mm Fan that I shrunk and put into my tunnel. Thank you for viewing this and feel free to leave a comment or make! I don't really have a mount for a fan or fog maker so please let me know if you make one!

P.S. I used a box fan and a humidifier ; )

P.P.S. I'm brand new, so plz be easy in the comments!!!!1