I won the last series in professionals in this car, all gold.
Some of the changes i made were:
Gears Set second to last meter wide out to about 4850
Use bottom meter on that screen to adjust speed to longest straight.
LSD
6
58
7
Dampers, I only changed bound, down to seven or up to nine,I cant remember which one is better for hong kong (short course).
Front diving out under brakes is two things, brakes and stabilizers.
Higher stabilizer setting in the front will help reduce the front end diving out. You need to balance this with the fact it may take a little more to get around a corner if you set to high.
Even the brakes up a bit, not too heavy on the front. Then use the gently, don't just jump on them too late. The car handles well through corners so slow a little earlier. The rcps etc may un-nerve you with their shorter braking distance, but you don't need to copy that technioque to beat them, use your own.
You probably dont need to adjust the spring ballance.
lower the car a bit but not all the way.
you can also use automatic driving aids to reduce the understeer problems.
look also at the playstation car, its front is radically lower than its back, does this make it handle better.

foghorn_100

No B-Spec for me.