I’m setting up a brand-new MK4 and noticed a menu option under Root → Advanced called “Perform Selftest.” When I select it, the device first asks “All on?” and then “All off?”, which seems like a screen test. After that, it displays an animation of an NFC device, and I’m not sure what to do next.Has anyone here actually used this self-test? How does the device indicate whether the test passes or fails?There are many YouTube videos about setting up the MK4, yet not a single one mentions this feature. That seems odd for a device aimed at security-conscious users.The only explanation I’ve found from Coinkite is this: “Perform Selftest: Start the factory self-test which clears the settings, but not the seed. MicroSD card required.”