Stay above .2 (recommended lowest build for the Hexohm). I would look at using claptons, or at least 22 Gauge Kanthal. The # of wraps is dependent on how your atty reads on a ohmmeter. I'd start with a 5/6 wrap of 22 Gauge, Dual coils.
Ah ok! I'll give that a whirl when me 22g comes in! Thanks a million!Try spaced coils rather than touching.