Plywood Air Filter

I built zgbot's air filter for my Thing-o-Matic during the machine's build process. I made it to sit on top of the machine, but after about 6 months of being moved around the duct tape started to come loose. Between that and a circular saw I hadn't had a chance to use I decided to make a version out of plywood.

It takes a square cabin air filter about 8"x.75"x1", which I believe is used on Toyota and Lexus cars such as the RX 350. I'm not really sure because I just bought one from an auto par