there are some silicon plugs that come with it that you can use in place of the fill screw.....makes it tooless that way. Not sure what they mean by tabs....unless it's the little notches around the screw to adjust airflow.....it seems to come shipped wide open which to me was like sucking there a huge straw......way too airy. I closed mine down more than halfway. sure is a warm vape on my istick.....I need to find some set up that cools this down for me. I have some 30 g kanthal going to try and build something tomorrow......also have some 34 g premade coils sitting around that I use on my kangers.....might try them too just for fun!!