Hmmm, I have the RM3 single and dual coil versions, I prefer the RM3 Dual since it gives me the ability to do single and dual coils. Yes, the draw is a bit more airy than the RM3 single coil (1 air hole) version, but not nearly as airy as a RM4 and RM5 even in their lowest setting. The RM3 is a...