I designed the V2 for Full version in a bit of rush and guess what, it was a massive failure. The boards were working nicely, but microSD slot was placed 180 degrees in a wrong direction (slot was facing against USB connector...), analog 3V3 was not connected to upper board due to an issue in schema plus few other minor issues. 

What did I learn from this? REVIEW YOUR SCHEMA AND BOARD DESIGN BEFORE SENDING IT TO PCB MANUFACTURER!

One positive learning from this episode was the possibility to move SD card slot outside the device. Usually the logger needs to be installed on very tight place, so sometimes it's actually good to have an option that you can bring the SD card slot to more accessible location.