The dripper with massive air has been doing well all night, so I tried a Kayfun again.
30g on a screw (about 3mm I think), 8 wraps, comes out to 0.21 ohms.
Set at 410 degrees, 30 watts, I got about 4 draws, then started getting the temp limit again.
Soooo .... I decided to try an acrylic...