Hi Jon
Thanks!... we're using the standard Twenty Twelve theme for this test (http://wordpress.org/themes/twentytwelve).
What I did was removing the navigation, sidebar and footer (content) from header.php, single.php and footer.php. You can find the original theme files (v1.4) and modified theme files (v1.3) below, as well as the screenshot for the plugin settings page below:
Theme files: http://goo.gl/KPaZfs
Plugin settings screenshot: http://goo.gl/JZPSsZ
Let me know if you need admin access to the test site, or if you need any other information.
Thanks again!
Bowo