I am still pondering on a G3X PAW traffic solution. If I use another Raspberry Pi, I have one spare for some reason then maybe a solution is attach this to the PAW via ethernet, get it to autoboot to the browser with the PAW IP address and radar page and use the HDMI output from it to go to the G3X via the HDMI-BNC(PAL) connector. Seems a bit of a faff but would it work as it costs me nothing. Not sure what the startup script is, could do it in MSDOS though!!