Hi Everyone, My name is Jim and proud to say i've have been off the stink sticks for a month today after a 35 year up to 2 pack a day habbit. I am presently using a smoov bat. with a blank cart. I did luck out and found juice I liked local but now I want to upgrade to a better vaping experience. I was leaning towards an ego vv with a tank but not sure anymore. I have spent hours looking at different units and now i am just getting confused. Am I right in saying that if it has a 510 end it will fit all 510 ends. I just don't want to waste alot of money right now for something I may not be happy with. Are the kock offs just as good as originals? Just need to be pointed in the right direction. Thanks, Jmi