I'm wanting a single coil cartomizer, 3 ohm with a flange and i found these ----> AltSmoke.com | Personal Vaporizers | Electronic Cigarette | Ecigs | Dual Coil on your site but i'm curious as to what brand they are? I prefer "BOGE" cartos and i purchased some 3 ohm, single coil BOGE cartos for my tank but they have no flange around the bottom and i worry about the tank sliding and leaking. Thanks in advance!