Hi Martin,
Thanks J
It took me a while to realise that I needed to recompile gnome-shell-extensions with ruby/sass installed to get User Themes, but after that it worked.
Does your tip actually change the top panel font or does it make the top panel smaller thus forcing the font to be smaller?
BTW this also appeared to show that attempting to change fonts with the gnome-tweak-tool fonts/window title has no effect…
Regards
John