Thanks Ray.
One minor note: The https://openthings.freshdesk.com/support/solutions/articles/5000716364-user-manuals page defaults the link to the OSUserManual220(1).pdf as http, so is less secure. At least in Firefox browser there is a security warning when clicking to download. It is simple for the user to change to HTTPS manually, though better if you change the 5000716364-user-manuals page to explicitly say https, or have your raysfiles.com server force redirect to https. Or move the PDF to Freshdesk server. This issue does occur for old manuals which are hosted on the same server as the 5000716364-user-manuals page at freshdesk
http://raysfiles.com/os_compiled_firmware/docs/2.2.0/OSUserManual220(1).pdf