Originally a shower rack, I removed the wheels and fastened it to my TV shelf with wires. The fans of the single board computers where so loud and ineffective that I chose to remove them and instead installed six of Noctua’s cheapest chassi fans. After a while, I noticed that dust builds up, so I fastened these grease filters with some Velcro. Easy to take off and clean. I know it looks ugly as they are weighed down in the corners, but their purpose is to catch dust, not to walk the red carpet. 😎