914-6 alignment specs, optimum suspension settings for the stre Options

[SC850R]

I would appreciate any suggestions anyone might have for alignment specs. My car is a 2.7 liter 6 with a 911 front suspension and 7 and 8 inch fuchs ft and rr. I had the car realinged as suggested by a local tuner and it went from predictable, understeer to a tail happy, unstable beast that tries to swap ends even with highway lane changes. My hope was to optimize the performance of the car, but its really unstable now (keep in mind I like neutral to slight oversteer, but this is unsettling (IMG:style_emoticons/default/ohmy.gif) ). High speed sweepers are a nightmare!
BEFORE
left front> -0.7 camber right front> -0.3 camber
left rear> -0.6 camber right rear> --1.8 camber
toe at the front was 0.15 (toe out I think)
toe at the rear was 0.00

AFTER
left front> -1.1 right front> -1.2
left rear> -1.2 left rear> -1.3
toe at the front> -0.03
toe at the rear> -0.05

What do other people use? Why did the car change so dramatically? Could the toe change have had such a dramatic effect? There were no changes in the tires or tire pressure. Help