I'm using the smoktech dual coil cartomizer tanks that come stock with smoktech dualcoils in them and they rock as long as you keep your tank filled. I find that if you fill these from above, they will clog and die within a few days... But as long as your keeping them wet, like in a tank that is constantly feeding them juice, they rock for a good long time. I'm wondering, does anyone here know how the coils are positioned? I know these are dual coils so, where are the coils? Vertical on each side, or horizontal on the bottom? I ask because the top of the filler material is always bone dry when i'm using these in a tank, but I've never gotten a dry hit or anything from these. So I'm wondering if the coils are situated toward the bottom of the cartomizer, yeah? Anyone know?