Customizable rotating ajustable vent

While working on my printer enclusure, I stumbles upon this ajustable vent http://www.thingiverse.com/thing:55205, but it was not the right size for me. So I took inspiration from it and to practice my skill with openSCAD, I decided to make a customizable version from scratch.

I added screw holders because I did not want to glue the vent and I also added an inside part to screw it on and to hide the inside os the hole.

Like the inspiration part, you can use 3mm filament to joint the door and holed part or you can customize the hole size you want.