How to get into Fort zancudo in stelz mode ? (Grand Theft Auto 5)

I've been trying to find a way to get into the Fort without zancudo stars by stelz-mode, a variant of the contact database has long been of interest, but does not work.
So far, only managed to notice that you don't let the stars in these places on the basis of: in a trench around the base, parked cars, radio towers and the hangar next to the tower, but only on his half, and still the same bunker with the non-working Elevator, there was the helicopter to sit on the grass there, also there are no stars.
Foreign the website has found a way to get to the tower there here https://goo.gl/ODLZtJ
As they say on the site it is necessary to a mountain jump and parachute at low altitude to land right at the entrance to the tower and as they say there, need to quickly enter the tower and take out 3 people in it and the camera that captures the front door.
But I have at various attempts to fly over the base by parachute at night, above, below usually the stars appear to touch the ground.
That maybe someone was already without stars to do as in the article you write.
More here from the article these pictures are interested in, where the three heroes of the game are in the tower and radar gray, and warriors do not see the player, it is possible to reset the stars in the tower, but I have not, even if I'm in the tower, no one sees, I have a radar red and gray not getting, like when the cops lose. I wonder how I did it.

Maybe someone actually tried and failed to get into the tower without the stars ?