I need to blow off some steam. After searching for endless hours online for these damn cartridges, I've had it. I cannot believe that this company along with a few others have decided to pretty much bend over their customers and make them pay $10+ for a cartridge that is sold everywhere else for $3-5 (Vision, Stardust, SmokTech, etc), only because their cartridges have their retarded thread pattern (m601). I have been reading a lot and I'm not gonna name any names but the arrogance not only shows in their discussion on forums but through their products as well. I understand the business side of having your own thread patterns, you want customers to buy the refill cartridges from you only but charging 4 times the price that everyone else charges for the same cartridge (minus thread pattern) is freaking ridiculous! We already over payed for the PV and now this?! I can say that I will be moving away from these companies and buying from companies that appreciate their customers and don't try to ass rape them every chance they get. And I'm sure a lot of other people who have encountered this situation will do the same. rant over.