Spenzalli,
Yes I agree. My current set up is:
springs Front - purple,
Rear - copper
shocks oil 50 wt.
Sway bar Front - 30 deg from flat
rear - flat
The purple/copper combination was recommended so I am trying it.
Maybe increasing the rear sway bar setting and decreasing the front sway bar setting will help tune out some understeer. But in the end I think I will need to return to using the same springs front and rear and fine tuning the handling with the upper shock mount locations.