You still don't get it. Where do you think the air is coming from that you are using to create the vapor flow? If the atomizer were sealed completely your e-cig couldn't function. The air is coming from holes in the atomizer. On the 510 atty the holes are located just above the threads on the bottom of the atty. All attys have to breath to function. If those atty holes are inside the box then there is a possiblility of leak.
Kevin
Kevin