Crawl...what ^ said. Microcoils spread the heat evenly and maximize the vapor process.
Check out that microcoil link I sent you.
I just started looking through it and watched THIS video here. I'm a bit confused because I thought a micro coil was one with a very low gauge wire. Yet he used 27g kanthal. I just bought some 28g kanthal about an hour ago.
So really, what is the definition of a microcoil?