accessories gas cartridges. i would have liked to go away with it at the weekend. but without information which cartridges i can use with it - NORM cartridges or ONLY Campingaz cartridges, is important information. are the other - more common gas cartridges like this one for the Kemper or all the other gas cookers compatible with this camping gas cooker? also for the Kemper. no info anywhere. i would have liked to know what else i need to order to have the thing ready.