Well, after I realised that the correct way to set FFB is to put all
values the same, I reassessed the "cockpitLookDeadZone" value. It turned out
that this value should be much lower than I previously thought. On my system
it is somewhere around 0.002760.
If your system is well trimmed (this means that everything else is
free of lag as much as possible), then you can find this value by starting
with 0.000000, and moving up by 0.000100 step. This way you will understand
exactly what is going on with FFB.
Of course, perspective should also be good. The horizontal distance
from my eyes to the edge of my table, where wheel is attached, is 44 cm.
This can help you to set FOV correctly. Just measure the distance from
screen to the edge of table, and add 44 cm. Vanishing point shouldn't be
more than 0.5 inches, or 1.5 cm wrong, otherwise strange things happen, and
it isn't posible to set FFB correctly.