Got my clone in the mail today. Built dual 28g 1/16" ID 7 wrap coils for 0.65ohm. I'm really liking this atty, but I may try a single micro at about 0.9ohm(my usual in other drippers), it's a bit hot for my liking, the flavor is amazing though.
I'm wrapping on a little screwdriver that's like the one that came with mine. I'm guessing it's about 1.6mm or about the same as 1/16th. 7 turns gave me 1.1 ohms, and 8 turns 1.3, so I guessing 6 turns, and angle the coil slightly should put you at about 0.9 ohms.
I've also went back to closing off the air hole to match the juice I'm using. As it turns out, some of my mixes are almost too intense for a tighter draw and it's nice that I can just open the air a little to smooth the flavor out a tad.