Prusa Research, a company well-known for its 3D printers, collaborates with Grafana Labs to enhance the observability of its expansive printer farm using Grafana's tools. The integration of observability into 3D printing allows for the optimization of printer functions, such as testing heatbed probing and filament sensor values, which are crucial for improving printer reliability and efficiency. Prusa's use of open-source designs and their extensive printer farm, consisting of over 700 units, exemplifies their commitment to product reliability by testing and using their printers for production. Grafana's observability tools, particularly their transition from Thanos to Mimir for better data querying, plays a vital role in managing and monitoring the printer farm, highlighting the synergy between software observability and hardware innovation. The collaboration underscores a shared philosophy of using and testing products internally to ensure quality, much like Grafana Labs does with its software platforms.