I use the smoketech DCT on my provari, the 5ml tank and havent had any problems. I vape high pg juice and use the smoketech prepunched replacement cartos, sounds like you are having flooding problems instead of a leaking issue. Check your carto in your tank and see how many holes it has in it at the base. With high pg juice, i only use single hole cartos, thicker juices may need 2 or even 3. Flooding is usually to many holes, burnt taste is usually not enough holes or improper filling. I usually get my replacement tank cartos from hoosier e cig, they have single coil, 1.7,2.0,and 3.0 omh, and also have them in dual coil if thats your prefrence. Alot of the forum suppliers carry these replacement cartos now. Dont know if i helped you any, but i gave it my best shot. But you will love the provari, its a great purchase!