The image inside the roon.zip file mentioned in the below linked blog post is named roon-1.3.img. Is it a file name typo? Is it the 1.0.3 version? Is it the 1.3 version? Is it really 1.0.4? Is there a way to check the version while running the image?
I would also like to suggest a better way of releasing versions of this image, the blog posts are very vague and hard to follow and/or search, the link is just a roon.zip that says nothing, the images folder is not browsable, there are no checksums, etc.