Review on 🔥 UCTRONICS Raspberry Pi Cluster with Metal Rack Case: 4 Removable Layers, Cooling Fans, and SSD Mounting Plate - Supports Raspberry Pi 4B, 3B+/3B and Other B Models by Bob Kussmaul

I love the shelf that uses metal as the material. However, I can say that this is the only value of their unique idea at this price point. These metal plates are not high quality and they are so rough. My finger hurts when I assemble the stand. The alignment problem is also a big problem. Some panels won't align, especially the 90 degree pieces. This makes it difficult to connect parts. Fortunately, the plates are so soft that I can fix these parts myself with pliers. The airflow hole doesn't fit either. The fans shown are so loud and don't have PWM support that you can't control their speed with anything like a USB speed controller/Raspberry Pi software, etc. There's no noise. It only fits if you don't use the optional official SSD slot. Version 2 fan guard is also good. For each layer there is some space for your Pi to use a small hat, namely a POE hat/sensor hat etc. It's nice.