I've been using 5ml tanks with double punched 2 ohm dual coil cartos for a couple years. I swear it seems like the cartos are more cheaply made than they were, but whatever the problem is, I'm not getting as much satisfaction from cartos. Sometimes I have to toss new ones because they just don't hit right, or they last one day then clog or don't fire up right. I want to try a bottom coil system for my Lavatube HV mod, that at least handle 5 volts. I don't know which one to try, money is a little tight and trial and error is not a good option right now. I'm wondering if a bottom coil gives dry hits, if they last long and are easy to fill. I can't figure out how they work without a wick. The only other things I tried were kanger and vivi nova top coil, and the dry hits were overwhelming for me, others love them but I don't see why. Should I stick with cartos? Maybe try a different brand? (suggestions) A single hole single coil if I could find them with a little bigger of a hole. The only ones like that I found didn't have the flanged bottom. OK, long winded, but I need some help. I've been buying from CCV 15 pack of carts for $25, smoktech or smoktek, not sure. Maybe there's a better carto? Maybe the bottom coil tank is better? That's where I'm at. Thanks for any help. PS Juices are usually 60pg/40vg