Thanks for the response. I tried to update the 64GB Rachel-Pi image but wlan0 is now a hotspot so that won't work for updating, and eth0 is probably configured the same because I can't get online with it now to update. How were you able to update?
I spent some time on the installer script at the git and have got it running on stretch but there are a few issues to work out. The content shell and admin interface on the git are outdated compared to the latest rachel-pi image. There's no shutdown option in the web interface for instance. A new image should be made imho.