ok i haven't tested them yet - wits tech kindly ran a preliminary check - they arrived over the weekend. they have at least been booted up from USB-OTG and an OS installed, so it is known that RAM, CPU, PMIC, NAND, HDMI and USB-OTG all operate correctly. i will be able to fully test the rest of the functionality once the micro-desktop PCBs are assembled, which should be another month or so.
l.