Start thinking about rewicking the kanger heads. You'll need 3mm silica for the wick, some kanthal, and some 1mm wick for the flavour wick. It's dead easy rewicking them.
Have thought about it. My itaste vv3 has a built in ohmmeter, so that's nice. The heads I get from Sun-Vapers have all worked great for me. I saw a video posted here on how to microcoil a Kanger head, and was all down with that until the guy pulled out a butane torch and started torching the coil.
Seem's like a lot of work to save a buck. If I start getting bum coils, I'll definitely start thinking about it, but right now the heads are performing great and are so inexpensive that as long as I am getting good life and performance from the coils I'm satisfied thus far.