Hi Martin,
Yes I've tested 30/0 and found that whilst it seemed to make the car feel more stable , I always seemed to make more mistakes with it fitted.
I have run 25/3 but prefer 25/5
I've also run 20/10 and 25/10 but I've never run 30/3, or 30/5 or 30/10
30/3 or 30/5 might be interesting in wet conditions... Hmmm - might have to think about that :-)
HTH
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