I pulled the original build out, first thing (didn't even bother to see what it was, lol), and put in my own build. Same build I use in my Kayfuns. 1.2 ohm 26 gauge. I run it at 15 watts, same as my Kayfuns. I've not tried a dual coil build on it yet, since it doesn't really seem like it's made for it (like the Orchid is).
All of that said I've been vaping on it since it arrived and the more I use it, the more I'm liking it.
All of that said I've been vaping on it since it arrived and the more I use it, the more I'm liking it.