Thanks - but the scaling only works through a web browser, I'm using a VNC viewer on the tablet. Anyway, I've made some more tweaks to /boot/config.txt and I've had some success. I don't know why it wasn't working before, but thanks for your help!
Firstly, a big thank you for assembling this project, it truly is a real time saver. I've configured my Astroberry to connect to my wireless LAN with a static IP and aill is working find. My only issue is that I'm trying to access the Astroberry from a 10" Android tablet (4:3 aspect ratio). When I connect via VNC, the resolution is always 1920x1080 regardless as to what is set in config.txt. I'm guessing this is somehow coded in X11VNC but I'm not really sure where to look to find it.
Can you help?
Many thanks in advance!