I have many clone mods and a few authentic mods. My latest buy was a Big Nasty. One thing I have found in common with all authentic mods I have bought is NONE of them hit nearly as hard as ANY of my clones. I have cleaned all the threads thoroughly, battery is fully charged, atty metering to .6 yet very little vapor. I can put the atty on my el cheapo Ebay Chi You clone and it performs nicely....on my authentic King, Steam Roller and Big Nasty....not so much. So my question is...am I doing something wrong? Is there a trick to getting great performance out of these authentic mods? I see many reviews on the Big Nasty where people rave and rave about it....Im very disappointed. It was like going backward three steps from what I was doing on my Cheapo Chi You. Anyone have any suggestions?