One thing to note about the eVic Supreme is not to over tighten the tanks down for either fitting type. The replaceable contact on the supreme raises the height of its center pin. If you over tighten it the metal center contact on your tank will cut through the insulator shorting the tank to 0 ohms. Snug down to tank and then raise the finishing ring to make the tank more secure. Doesn't happen on the Nautilus because the center pin is spring loaded, watch yourself on the Kangers though. I learned the hard way.