Sorry for the late reply, it looks like I'm allowed only one post per day due to bot/spam prevention measures.
The board is marked as MXQ-HX-V2.0 and has a sv6256p wifi chip which means no wi-fi for me (not that I really needed it, but still...)
Here's a picture:
I can clearly see the serial port pads marked between the USB and SPDIF connector so I should be fine if anything goes pear shaped.
Still, I'd feel more comfortable knowing if there's been any test done on this board.
I don't need video output or anything else as this is going to be the DNS server of my local network (Pi-Hole, DNSCrypt and all that jazz), but I'd really appreciate not having to sacrifice an SD to hold the rootfs and, more importantly, the ethernet MUST work.