Ok, I bought my first mod, and E-power 2800 set, which takes an 18650 battery and is 510 native with ego cone threads. Before this my only experience was with KR808-D1's (which I do still like and use). To start with, I got some 1.7 Ressurector cartos, adual coil tank, and a couple of debridged atties for dripping. Atties would screw all the way in, tank didn't screw all the way in, ressurectors worked, Bloog cartos with an adaptor worked. Ressurectors stopped working, but all the sudden my drip atties now work. drip atties stopped working, and now my tank works, with a 510 extender that didn't work before. I'm actually afraid to take the tank off and try the Ressurectors again, because mybe nothing will work anymore.. On a side note this is a replacement E-power, since the center post in the 510 connector in the first one dropped in too far to make contact, and didn't like being pried back up (please not that I have been careful not to torque anything down).