Just recieved my mini protank 2 in the mail along with 1300 mAh vision spinner, and it doesn't come with any instructions on how to assemble it correctly. I screwed the coil into the base unit and then the base unit onto the tank and the draw is incredibly tight, there's no way it can be that tight for vaping. Am I supposed to remove any of those plastic pieces? Also I have tried not screwing everything down so tight, still has restricted airflow. Any help appreciated.