Ok, I've scored an otherwise new iP4500. The person who gave it to me bought it cheap at the markets only to discover the pins that contact the black cartridge chip were bent/broken. Buyer beware etc. I was wondering about how to fix it. Whoever gets it will be using ink refills. So is there any way to permanently bypass the chip - or alternatively, I guess the chip could be hardwired in (and turn off ink monitoring). Does anyone know how to remove the cartridge holder in a straighfoward manner?