I've installed LibreELEC 8.0.1a on my Mini M8S II (S905-based) box. The installation file was LibreELEC-S905.arm-8.0-8.0.1a.img.gz, set up to direct boot from SD Card bypassing the factory-installed Android version completely. It worked fine from first boot, and I'm really happy with this package.
I understand that I should be able to update over the internet using the LibreELEC addon in Kodi, but although there is meant to be a new version now available (supporting Kodi 17.3 rather than my current 17.1) nothing shows in the LibreELEC > System tab > Updates section, either in Auto or Manual mode. In manual mode I set Custom Channels to Off, and Update Channel to LibreELEC-8.0, but Available Versions is still empty.
Andre