For my MTL build, I also used Kanthal (26 ga 3mm 7 wraps) I'm going to take it apart, clean it and look at the o-rings. I figured it's new so didn't even look at them but this was my first one and had issues getting the chamber off/on... might have damaged the o-ring. When I got my second one, I had my technique worked out better. The first build I used the airflow insert with the small holes... works great but slowly gets clogged with juice. Tried the one with larger holes this time (and just close down air intake slot more) This time I used a simple clapton (3mm 6 wraps) For my second one I used same clapton but 5 wraps (they are both pre-wound spaced coils) Like I said, I wouldn't have got them if I noticed they are wound counterclockwise! I actually liked my home wound coil better for the MTL build (might have been 8 wraps... came out to 1.2 ohms)