Can someone direct me to a post or sticky of what the difference to all the different models (510, 808, 901, etc) I have bought two different units and they are not satisfying me. I am a 30+, 2 pack a day smoker and the two units suck, Fifty one Trio and Blu cig. Day one I burned down several carts and batteries but only smoked one pack of analogs. I am ready to pull the trigger on something that will give me the throat hit and vape that I crave, thanks. I have ejuice that should be here today and am going to try to refill what I have but I am ready to throw down on a mod unit. Please post some links of the different models and links to dealers that have what I am looking for, peace.