Well in hindsight, I think it came down to a bogus o-ring and due to wrong wicking (having some wick near the airholes actually transporting juice to the airflow). I used the trick absoluttalent mentioned: fill with the airflow open, screw top on, open juice channels and vape away. Guess somehow this creates a better vacuum?
Can't say I've used the griffin that much since I first posted, as I am waiting for some wire to come in from FT, taking much longer than expected.
Thanks again everyone for the advice.