In an effort to bring together @Gordon 's sterling efforts with software development, I have pulled together all the forum titbits of info to produce the following. I will endeavour to keep this as up-to-date as possible.
As always, additions/corrections welcome - I will also post this in the wiki when I work out where to put it!
Stable build changes (from 22/10/15 up to 19/11/15) - latest is dated 20151102
Now using Kodi 15.2 Isengard and OpenELEC 6.0.
To CS4265 driver (the Cirrus DAC audio chip) to remove input definition which clashes with S/PDIF control.
exFAT drivers patched to 1.2.2 to include fix for more reliable filesystems.
An LED shutdown sequence to allow users to 100% safely remove power.
Added option to allow selection of build type in [OpenELEC settings} -> [System] -> [Update type]. Enables switching between builds without having to reboot to NOOBS.
Option to disable LIRC module - Slice will then ignore IR key presses from another remote.
Fixed issue where [Fast Forward] and [Rewind] went to [Pause] while seeking; the Kodi player will now go to [Play].