Awesome little product - thanks for all the time and effort that’s gone into it. I’ve just built my own and have the unit running fine except for one strange issue. The board doesn’t seem to want to boot with the SD card installed. Once I remove the SD card the board will boot and pause waiting for the SD card to be installed - once it’s installed it starts and runs fine. Any ideas? Something interrupting the SPI bus, is this a known issue?