Well, I corrected some things. The FOV and screen hight were wrong.
FOV was 61, and should have been 57, while screen hight was 0.147000
(7.35%), while it should have been 0.141488 (7.0744%).
It looks like FFB settings should be the default ones, so now I have
118/100/100/100.
All this is just right, I don't know if there is something to be
improved, but I'll try to find out (I'll again take a look at
cockpitLookDeadZone).