I have been didling with my maft for a few months. from the information I have gathered, it's best just to set your injector compensation with the maft and fine tune with the safc. I have been able to set the fuel trims on it but I have not done any mid or wot tuning with it. Im about to cave in and just slap on the old 1g maf and get a safc and be done with it. it's on my DD and it only has 510cc and a small16g(with suppporting mods of curse).it works, I just don't think it's strength is in fine tuning. besides, my dsm(fun/track slut) will benifit from the maft setup alot more then the ol vr4.