Thanks for all the help guys, tried less cotton by vape production was to bad, so tried trimming tails a little and working ok at the moment, I was only having issues after refilling which was annoying as the first tank could be so good. I notice your coil is sitting much higher than mine. If I raise mine higher I find it to airy no matter which air flow size I use . Maybe that's where I'm going wrong. My shoulders are almost going into juice holes. What do you think. New build pic,