I'm wrapping 30ga Kanthol around 28ga Kanthol 14 times for excellent vapor production. I tried 20 wraps, but when I dry fired it to make sure it was heating properly, they instantly went white hot and popped. These "Ultra Nano coils" as I've dubbed them are sitting on a cotton cloud of Cali Pro Venture which I believe is 60/40 VG/PG respectively at 6mg of Nic. I can put out clouds with EASE. Have you seen/made anything smaller or tighter?