Mike,

Have you driven a car with comp struts and no arb either on the road or on track to compare the differences?

No one in motorsport would stick their neck out to give you an answer as really its never really been done and tested...

I suspect the arrangement above, although it looks very well engineered is a little over kill. The fixings and drop links on the motorsport items are only M6 x 1 so offer little structral stength, they merely transfer through the links, blades and bar themselves.....

I suspect if you were to independently test your requirment Mike, the level of anti-roll you'd need would be a lot less than you imagine....even without overally hard springs.....

Ian