Ah, good to know, many thanks for that too. I confirm that it works when installed from your repo as a theme component on my site.
Alternatively, could I manually add it as an Ember theme component via the Customize > Install > Create New interface and then Edit CSS / HTML ? That would make it easier to quickly change the images and links as needed. I assume the contents of custom-header-banner.js would go under Head, and then <CustomHeaderBanner /> in After Header or Body , but not sure where to add the contents of custom-header-banner.hbs .