Yeah i'm using the eGo Mega Cartos right now, they are the same diameter, I wasn't sure if all DCs were larger or some were smaller, hence the question. I don't have a cone? I have a battery lol i got the tank system kit originally. As long as they screw in I suppose, I just like the smoother look -- having the smaller thing on top of a big ole battery looks kinda weird -- I know I know that is just an odd statement from someone who uses a kit the size of a large sharpie.
I am interested though, just curious the size compared to the eGo battery -- I have some single coil cartos as well, are they about the same size as a 510 single coil carto?