Inauspiciously but unsurprisingly, both the "Downloads" and "Documentation" tabs on the product page for this "open-source" board are empty. Some of their othe

Inauspiciously but unsurprisingly, both the "Downloads" and "Documentation" tabs on the product page for this "open-source" board are empty. Some of their other boards have PDF printouts of the Cadence OrCAD schematics, and even DXFs of the top and bottom layers of the board, but none have actual hardware source documents. Their Github repositories contain little more than pre-built images for the boards. Older boards do have CPU block diagrams and pinouts of the IO ports (which should be standardized, but it's nice to have them in one place) but there are no real datasheets for any of these CPUs. Yes, they claim "Everything about Radxa SBCs is open" but I don't see it. Ah, now I see how you'd customize one of these open-source products: Their "Services" page offers "Personalized PCB logo and customer SKU, and changes to pin-compatible materials, such as Wi-Fi speed or expanded operating temperature range" with no non-recurring engineering costs if your order is more than 500 pieces or $50,000" or you can call them for custom base-plate design or other mechanical changes to the layout.