Now @Stuman here should be your source of info, @550 Phil. He's got one of the first new-chassis Speedsters, so his configuration will be much closer to yours.
Having driven a real 356C in the last couple of years I have to say that with the exception of the view out the window, the driving experience between the real 356 and my car is very different. The new car is better balanced and more hard-edged. Pretty much what I was looking for.