With those 'cheap cartos' that you like (haha!) the dual coils...what you actually have are two 3.0 ohm coils working together..creating a lower resistance. You'll want to hang somewhere around the 3.7 volts. If you plan on using just those, I don't see where you would benefit from the Provari. The Provari opens up doors so you can use just about anything, because you can dial in whatever voltage is needed for whatever accessory you have. I don't know what type of 'tank' you first started with, but real TANKS, like what I've linked above have never flooded on me. The only reason I can think of for a carto to flood is overfilling. When I use JUST plain cartos, after I fill them, I put my mouth on the mouth part, and blow any excess juice out the other side into a papertowel. This gets the juice that ran over into the hole out, so I don't get it sucked up into my mouth.