The OCC coils that come stock with the unit, fire up and drop off instantly. I have tried to rebuild the coils based on several videos that I have watched on youtube, as well as building protank 2 coils forever. The problem I am having is my rebuilds do not fire up right away and burn after I let go of the button...sometimes for a few seconds! It also produces a burning taste on the long "afterburns". I have tried building with 26 kanthal as well as 26 and 24 nichrome. I have tried open coil(how they are stock) and microcoils. I have made sure wires aren't touching where they shouldn't. I am at my wits end with this. If anyone has any ideas I would greatly appreciate it. Thanks!