I started out vaping on an RDA about a year ago and I was building my coils at around 1.2ohms dual coil.Then after a while I needed more vapor production so I went sub ohm.I know some people build dual sub ohm coils around .4 or less a ohms.i built dual .3 ohm coils the other day on my stillare and I nearly hacked a lung out.I'm a single coil guy all the way,dual coil is just too much for me.Anyone else have the same experience?