I have been using Boge Carto's but I'm willing to try other based on recommendations. I don't care if they are pre-punched, flanged or not. I use Vapedudes texas tuff tanks so a flange really means nothing to me since I fill through a thumb screw and do not slide the tank to fill it. I'm looking for a decent place to buy cartomizers that has reliable stock and good prices. Where do you buy yours?