Grey Haze have the Vapetech and EhPro version, the Vapetech one is the one that I have, don't get me wrong it's a cracking RDA but it's not the most build friendly, no post holes and tiny screw heads but the air holes seem to be in the right place although I did notice that the top cap has to be in the right position to have them both fully open as they are misaligned slightly. I would buy the other one though as it has the post holes and bigger screw heads.
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