I don't use dual
coils. But my first impression is. Should have got another KFL.
Once I got it built it vapes good, but it took me half a day to get every thing set up. The positive post would not stay in place.
Threading was a bit to course, and gritty. "O" rings were a pain,.
After it was all over it does provide a nice
vape tough,.
Even old dogs have to learn.
Bumping to stay alive.