Thanks to Don and all contributor and reviewer for that nice How-To Guide!
I have 2 little remarks that I stumbled upon so far:
On page 31/39 you recommend to redirect some "very unusual request methods" in Apache. These are actual WebDAV commands and adding your rules will break any WebDAV implementation that is activated in or proxied through Apache. Its just my point, but I don't see a reason to recommend that and also I wouldn't call that a "hardening" or "security" improvement
The linked "vi Cheat Sheet" seems to be down, the link is broken.
Again thanks, you did a great job with the inofficial documentation!