I read that the eGo-T atomizer uses a tank cartridge that self-feeds the atomizer. I currently use the XL atomizer/carts (that holds 2ml of liquid). However, this tank cartridge thing is intriguing. Can someone provide more info for me? Does it leak easily? Do you have to refill it as often as regular cartridges? I don't want something that leaks, but I want something I don't have to top off as often, but will still last a good while before refilling. Is it hard to fill? Do I need a syringe? Etc., etc... I just need more info - as much info as possible before I can consider purchasing this!