Got a new rda, the Mephisto. Decided to put this Helix coil in. 2 strands of 26g twisted, with 2 strands of 30g in between the grooves of the twisted 26g. so 4 strands altogether. 5 wraps around 3mm drill bit, 0.4ohms. great flavour, great vapour. Doesn't take long to heat up too. Probably my current favorite coil.