Thanks a lot for the advice guys.
gardenvalley - I did try this, managed to get to 22w with the plexi coil and it didnt make much of a difference. Hopefully the other coils i try will fare better.
Leni - ll give the 1.6 coil a try, see if it makes a difference. Thanks for that table, i didnt even know they did a 1.0hm coil.
It's funny as this coil seems to be the only coil that is hard to get in the uk. I did manage to find one suppier and i've ordered a pack to give them a try.
Do you know why they seem to be hard to get hold of..maybe another part that is being discontinued?
ForestMagpie - I thought the airflow needed to be more open than closed for a better throat hit. Should it be more closed like you say?
I think i will eventually find the right combination that is readily available, even if it means changing the whole set up a few times.
Would you guys suggest that it's mainly the choice of coil that is causing the problem, rather than the tank and mod itself? Or do some tanks (and their own version of the 1.0ohm coil) perform differently? If that makes sense lol