Trying to get tech support for a new HP laser jet 178nw imaging drum. The images on line are different from the drum installed in my printer, bought from a genuine HP agent two years ago. See image of the C1120A drum for sale with two yellow/gold "things" in the bottom left hand corner. Thensee my image of the existing drum and nodules on the cover. The nodules would prevent my closing the cover as they could not penetrate the two yellow/gold things. Nobody at HP could tell me what they were and why my existing drum didn't have them. One HP sales "comedian" said maybe I should smash the nodules flat with a hammer. Tried numerous times to get through to the right dept in UK. Mnay different numbers, multiple extension choices. Some were automated voices, others spoke with accents I did not understand. Nobody could help. Completely useless. I will never buy an HP product again.