I just got back into vaping (vaped for about two years, stopped around 6 months ago and just got back into it the other day) I'm running a billow v3 on a Cool Fire 4 Plus 70w mod. 2 coils of 21 gauge Kanthal, 6 wraps each, pushing .26 ohms. my biggest issue is that I'm getting a lot of dry/burnt hits from it. just using normal unbleached cotton and my juice is 30/70 PG/VG