I have the Smok G-Priv, and it came with the BBB TFV8, I originally used their coil heads then switched to a RBA deck with dual Claptons in it. I also have the TFV 12 and again I'm using the RBA deck with it. From what I've read in this forum the draw is dependent on the coil heads being used in the tank. it seems they go from large holes to small holes which change the draw.