I filed mine out, I accidently dropted the cap and it broke one of the holes, so I decided to file them out to look better, there is no difference. It works the same, just catches the cotton less if you move the airflow now lol.
Im really hoping to find someone to trade, I love the goon but I hit a mason today and I just fell in love with the airflow. Especially for my hot build, .31 ohm 5 wrap 24 gauge kanthal on my series box mod. Plus it's so quiet when you vape on it. I like that because then I'd be able to vape when my wife is sleeping in the same room.