Yo Spydro try 0.32 mm Kanthal (28 awg) and 5 cm of #200 mesh SuperFine, 3-4 wraps for a 0.8 ohm. Try to concentrate the wraps at the bottom. (at least from what i've tried, i used nogain for 1 week, and what i have read on italian forum)
The airhole is tight because is a eu-type of atomizer...