Or in my case I'm looking for a cartomizers for dummies explanation. 
I have a kr808d-1 e cig and I'm a complete noob, and I've just been buying empty cartos to fill...they seem to work ok, but I'm buying without really understanding what I'm buying. What's the difference between the bottom coil (forgive me if I describe these things wrong) a horizontal, double, etc etc. What are the other differences for this type of model... What makes a 'good'cart or a 'bad' cart ?
I also hope I've got the right sub forum lol...
Thanks in advance for your help!

I have a kr808d-1 e cig and I'm a complete noob, and I've just been buying empty cartos to fill...they seem to work ok, but I'm buying without really understanding what I'm buying. What's the difference between the bottom coil (forgive me if I describe these things wrong) a horizontal, double, etc etc. What are the other differences for this type of model... What makes a 'good'cart or a 'bad' cart ?
I also hope I've got the right sub forum lol...
Thanks in advance for your help!