If anyone wants to try, you can test my latest dev build: LibreELEC-S905.aarch64-7.0-devel-20160915211230-r23341-gb83596f.img.gzI identified an issue in my changes that lead to "Could not mount" even on my S905 box, now corrected.
Keep in mind that it contains some untested changes that I play with, related to powering the box. I would be grateful for information whether it boots OK on S905X.
Boots well on nexbox a95x 2/16.
It took two iterations of installtointernal for it get it working off of the internal memory.
Still exploring (I am relatively new to Kodi). Only issue encoutered so far is that the amcodec aligns 'letterbox' video to the bottom of the screen and is only corrected by switching to software decoding or by stretching the video to fill the screen.