Markk,
You're doing the Tim Finch thing of comparing full on race cars that ONLY get used to do events, with road cars that get the occasional use on the track (okay, he always compares everything with a full on WRC car , but you get what I mean ) .

I desparately want to fit compression struts on my car (WITHOUT sacrificing the ARB), but NO-ONE can tell me what bladed Grp A style ARB I need to be as stiff as the standard one in it's mid-setting (so I can try both softer and harder to see what improvements this gives (as in making the ARB softer or harder)).