DT Experts has placed a number of user manuals and other useful documents on a file-sharing website. We have the majority of HME systems operation manuals, as well as as few from 3M, and the Quail Digital System.
The address is http://mediafire.com/dtexperts
Just click in this link: "User Files" and you are there!
We are adding more periodically, so check back often. As always, leave a comment or contact one of our affiliates if you need something that is not in the user files folder, of if you have any questions.