i just picked up some blank 510 xl cartomizers from myfreedomsmokes.com and they are very wierd. I popped the top off and instead od a silicone insert in there it was a black piece of plastic with 2 side holes and a middle that slides onto the middle tube were the wires are. also you cant see the filling, there is a plastic covering over it? but filling them thru the battery end works sorta. seems like i get alot of liquid in my mouth alot. I know im not putting more than 1 ml in them for thats what they hold. any ideas?