Thanks for this post. I was wondering why some people had to ground their hana modz then ? Also i noticed something, when i remove my RBA, using the coil live analysis, i see that sometimes, i don't get the "?" mark, meaning there is nothing plugged. If i move the pin around, it gets back to what it should be. However, it does not seem to affect the resistance reading, because when atomizer is screwed in, the pin seems to take his correct position.. I wonder why it reads a resistance value and that moves when i move the pin with a screw driver and stays with a resistance value without anything plugged in, until i find a position where no atomizer are detected. i saw value such as 0.047 until i moved the pin. Any idea? is that the 510 and lack of grounding or what?