I stopped smoking last month and started vaping. My husband and I are both enjoying it. We tried e cigs before, I had the blu cigs and the smoking anywhere cigs but we didn't feel that they were actually strong enough to be a good replacement for smoking. So then I got the tornado tank and love it. I started trying to see if any of the old cigs that I had would work with the tornado and found out that there is more than one size. Alot of the goodies on the web look like fun but I am afraid to get them because I dont know if they will fit. How many sizes are there and how do I know that if I want to buy a fun looking cartomiser if it will fit to my battery. Love the Totally Wicked web site. Stuff arrives in two days!!