Well, the discovery of calibration problem sped things up. Now I am
having consistant results. I found out that Centering Spring should be as a
result of multiplication of Overall and Spring/Dapmer (if those two are
equal). So, for example, these settings are balanced: 125/80/80/100,
80/125/125/100, 125/100/100/125, 100/125/125/125. Centering Spring is the
key of FFB, if you have this right, the rest is easy.
So, it looks like I am almost done. Only have to decide which one is
"the right", 105/100/100/105, or 105/105/105/110. The first one feels just
right, only it is a bit skiddy (maybe because of latency). The second one is
like safer to drive. I'll see, have to test it on different cars, and put it
through some tricky situations, and to see which one is faster, didn't have
time to do that today.
Ah, life is beautiful, : ).