I have installed the Sabre with the FSX update. Everything works fine but the airbrakes do not employ visually neither with "/" nor from the virtual cockpit although the count up and down numbers show up on the screen.
After you have installed the "sf86fsx_fixup.zip" package, you must install the Sabre gauge update SP1 "sf86efu1.zip" as well. This may fix the problem.
Greetings,
Hansi