Hello,
I was thinking a good feature to have would be to mark a document as private. This would enable only techs to see it. Unless I am mistaken, the Documents are used as a knowledge base of sorts, and a private/internal feature would be good to have. I understand you could create a bogus company and store the documentation under there, but I think that adds complexity and possible confusion.
Just my two cents. You guys are awesome, and please keep up the amazing work on this product!