i have a kr808 that i have been using since july (my first ecig). all i do is refill the cartomizer by putting the liquid into the end with the filler stuff.....i keep reading about all these different things- drip tips, taking out the filling, abbrevations for things i dont even understand, etc. i have tried reading several different posts about random things and i still dont understand what most of it means. i love my ecig, but it seems like eveyone else is doing a lot of modifications and im wondering if i am doing something wrong.