I had about a week when I first got my Subtank coughing like a 12 year old.This is a great point that I forgot to add. Higher nic with a sub ohm is fucking harsh on the throat.
Now I'm on ~7mg nic at ~70vg/pg and it's all good.
https://m.fasttech.com/p/2069500
For anyone who's looking for a new tank and hasn't tried a Kayfun this model is supposedly one of the best clones, don't use the cheapest shipping unless you want to wait a month for it to arrive.
I have a cheaper version (I'm ordering this one too) and it still performs like a goddamn champ, I've been building it at .8ohms and flavour is as good as anything else I've tried and it's great for mouth to lung vaping.