It doesn't seem to far fetched. Just take box mod with room for batteries, wires, circuits, and spare room for a tank. Instead of an atty connects on the outside place it inside with a hole big enough for a tank to be dropped into the box on the atty. the top of the tank could be big enough to close off the hole. Essentially you would have a box with a mouthpiece sticking out of it. A very pocket friendly mod with a dual coil tank would be amazing.