Which ever one you get, I suggest swapping the airflow adjustment insulator in the top cap of the
rda. if you don't and you build your
coils too high or drop the insulator to low it can have some catastrophic failures. This happened to me about 15 minutes ago while messing with the adjustment pin. The insulator melted and fused to the
coils, causing the. To unwind and come out when I attempted to remove the top cap.