KitKat 4.4 :: Nexus 4 - Reverting Back To 4.3?

Some issues are correctable through doing a factory wipe. Other issues can be corrected through reloading the image from Google's own factory image repository. However, some things (in particular the battery drain issue) seems to be an issue within 4.4 itself, and the only solution I've found has been to revert from 4.4 to 4.3.

So I'm posting this thread and asking the more knowledgeable users here on AndroidForums to post clear, concise directions for acquiring and flashing these devices back to the Google "factory image".

The reason I'm asking for the community to pitch in is that the instructions I've seen are kind of scattered, are not necessarily up to date, and they can and do vary depending on whether you're doing this with Windows XP, Windows 7, Windows 8, or with Mac OS X, or with Linux.

I was able to re-flash my Nexus 4 in Lion back to 4.3, but I had to do editing of bash shell scripts and even then had to issue the execution of the appropriate shell script from the exact right spot or else it couldn't find the command, or couldn't execute the command. The directions on Google's site were incomplete, and the ones I found on various message boards seemed more like an author's "best guess" than authoritative "you can trust that this will work" workflows.