i have built a regular coil, micro coil, even a nano from 1.8 ohms to 1.0 ohms. i have also frilled the air hole to 3/32. i thought i was doing good until today when i had to go back to 6mg nicotine and damn the throat hit is about to kill me. im running it on a SVD. same juice in a stock protank and all is good with no TH. i have a cotton wick and also tried cotton in the chamber to reduce chamber size but its not helping. someone has to have ran into this problem before.