Ok, I love this gizmo!!! First of all I had trouble getting a vacuum at first. I'm vaping 7.4 and using a 5ohm carto, so that eats a lot of juice. I have a sealed V2 shorty adapter, that I filed down because my stainless steel duals weren't firing. That made me think, since I about removed all of the air slots off. I hooked that up and viola!!! The DOD is rocking now!!!