I've been using the igo L with 3mm silica and 32g kanthal. I drilled out the airhole to 1.5mm but now the hole sits directly at the base of the drip well so I'm thinking if I make it much bigger im going to start cutting into the o-rings. just ordered 2mm ekowool and 30g kanthal so i can try more wraps and still use it on my zmax v3 which wont go lower than 1.3ohms. any suggestions to make more clouds? so far im loving it except for the random harshness I'm getting which i think might be just my coil getting slight hot legs or something...