Optional Dust Cover for Homebrew NAS
Using a Dremel tool, you can easily improve the airflow / cooling of your Homebrew NAS by cutting out the door and mounting one of these filters. If you're careful, it can look very good, while creating a large filtered area for air to flow over your enclosed hard drives.
These filters are designed for 120mm computer fans, which is the ideal size for a cutout in the enclosure door.