Morning, So im currently messaging a few local breaker yards about single pot st185 callipers and holders, i shall most likely be buying brand new astra disks for machining also. Before i buy anything tho, my question is, has anybody got this setup who's running rota slipstreams? A friend currently has the upgrade with only .3mm gap between between holder and wheel, im worried because my rotas look a fair bit deeper than his wheels (even taking into consideration a spacer it looks a lot to ask!) I would just try his on but i live near manchester and he's in lincoln... Any help greatly appreciated! Cheers.