The last thing I expected to be asked about was how we enabled the cycling banners here on the forum, which was a good spot by some that it isn’t a default Discourse option. In the spirit of open source, my late-night hacky script and style are here for sharing.
We currently have just two headers, but the component is written to allow us to add as many as we want to the carousel using data-* custom attributes. I’ve split the stylings and the script the way I have, so all a moderator needs to do to add a new banner is copy and paste an existing one and change the ID, link and image. Presto
This is just a custom theme component, not an installed plugin. If you are a Discourse admin, you can do the same.
Complete the sections for Common CSS, Head (just a script tag) and After Header (the HTML markup).
So, for @haitheredavid and the others who have asked, my version is here:
my way to happiness. Thank you 