SDK Documentation Update?

When I first started this, I downloaded and installed the SDK for the sole purpose of getting the documentation files. Then I found out that much of what I was looking for was still empty. Luckily, I still have the FS9 Aircraft Container documentation, which fills in a few blanks, but I’m looking for something more current. Can anyone tell me if anything, especially the Systems page has been updated?

One thing that ive noticed using FSX/FS9 documentation, is that the config has been split up between flightmodel.cfg/systems.cfg/cockpit.cfg etc etc.

most of the electrical systems in systems.cfg are new.
it could simulate a lot IF we had the correct doc