I checked the XDA forum a bit, I found this but I'm not sure on how to unlock the bootloader, install TWRP and flash the ROM?
I had once bricked this tablet while playing around with rooting it and I had to take it to a repair shop. So I'd appreciate if there were working unbrick instructions and also working instructions on how to install TWRP.
I've found the number of the days feels much more than the years, and has greater impact, even though it's all equivalent.