Okay, I'll bite. When I go to the Study section, it doesn't list "Instruments" anywhere. While I can link to some of the titles you listed a URL for, when I try to modify the URL to go to "Study/Instruments", I get a "Forbidden" message.
What am I doing wrong? I don't need the manuals right now, but I would like to be able to easily locate this resource in the future by using your menu structure.
Thanks for your help.