First: sorry guys, checked the mail, didn't get them. Hopefully tomorrow.
Second: I was also curious about priming the cartos with no filler. I will copy and past part of the email Isaac from Ikenvapes sent me.
"Once you fill the tank with the carto inside, wrap your hand around where the bottom of the tank and device meet and take a pull. You will see 2-3 bubbles rise immediately and your done buddy. Just vape and enjoy. I would start the voltage off lower than the goal for the first few hits to break in the coil. With your 2.4, start at 4.2v, then prime it by the mentioned method for a few hits, then raise it to your sweet spot. These hit harder so you will find your sweetspot is lower than what your used to."
Also, DCT stands for dual coil tank cartomizer. It's an old term that is still being used even for single coil cartos.