[RKDinOKC]

With both my 88 S and 89 951s the setup mentioned did NOT include solid bushings. Originals worked great and made the setup a little more forgiving to driver input. Most everyone I knew that put on solid bushings and drove the car any amount on the street took them right back off.
Both my cars were very predictable with the stock rubber bushings and there was enough feedback I could feel the 1/16 on corner of the car was off before corner balancing.

LSD is a given for any type of vehicle you want to put power down, especially in turns. I really like my 928 because it has PSD. It electronically dials in up to 100% lock up as needed.

Just for clarification ARB = sway bar or Anti-Roll Bar.

Each driver's style is different. To me tuning a suspension soft in the rear so you can put more power down exiting corners is slower because you are sacrificing mid corner speed for a slight gain in exit acceleration just as the car straightens out. Corner exit acceleration is limited as much by the ability to maintain turning as it is putting power down. Put to much power or weight on the rear an the car is going to push to far out too soon. By the time the car is going straight again the weight should already be fully transferred to the rear for maximum acceleration.

I tune my springs and ARB for maximum apex speed not corner exit power application. That would be like putting softer springs on the front for better corner entry braking. I use Front Rebound to control longitudinal weight transfer under initial acceleration on corner exit just like I use Rear Rebound to control longitudinal weight transfer on turn-in.

Those that go stiff for transients try to maintain a constant speed instead of smoothly controlling the longitudinal weight transfer for turn-in rotation, apex, and then exit. What Andial told me was that the suspension only needed to be firm enough to keep the suspension travel from bottoming out. That way it was firm enough to keep the car afloat, but soft enough to keep the tires in contact with the pavement when the road surfaces are irregular.