Guess what, I finally stumbled upon the reason why some people have brake problems (not that I intentionally looked for it). And it's FSX' fault, so how about that...
The current update has a workaround for it. It ain't pretty, but it at least works RELIABLY.
Also, I've split the part on the mods from the rest of the documentation and moved it into a separate document. I still expect anyone to read both if he/she doesn't want to spend the next 20 years digging oil wells in Siberia with their bare hands.
The takeoff warning horn logic has been fixed as well.
There's now a (toggleable) alert whenever you're near a waypoint of a GPS-internal flightplan. You'll still have to do the rest of the navigation and handling, but at least you will now be notified if there's a turn coming up and you need to set a new Map Angle.
I've switched the Load/Save module from XMLConfig to Logger. Depending on FSX configuration (FSXMS/FSXSE standalone or side-by-side), installation is just as easy or 200% more difficult, but the reward is a vastly more reliable system. Instead of having a single, persistent configuration for the aircraft, you can now have two (from a saved game and default, i.e. cold&dark). Reading the documentation on it is required!
Link:
https://docs.google.com/document/d/1B-GNQdZwDj-N7mhsr9FvDklksX94BhsZ1cCEgfZ6G7Q/edit#
If you want to upgrade from the old Load/Save system, simply remove all lines related to DSD_XMLConfig from the panel.cfg and delete the associated files, then install the new one.
P.S: No 2D trim indicator. At 1680x1050, with WideViewAspect and at 0.60 zoom, the needle and scale be seen from the pilot's seat when turning the head into its direction. If not, there's always the FO seat.