Have a few bud. I had 10th spacers on before but running 20mm's was done the same time as a good few other mods so as part of that it's made a difference. More planted.
i got some 6mm ones on mine all round and it ever so slightly catches the tyre when going around aroundabout at speed there is enough lean just to skimm the tyre... perhaps going to buy a set of 5mm ones