Techniques are provided for modifying a printer cartridge and an imaging drum unit intended for installation in one type of printer to be installed in another type of printer or a plurality of printers. In one aspect, a method of modifying a toner cartridge may include modifying one or more end plate of the toner cartridge. In another aspect, a method of modifying a toner cartridge may include replacing one or more end plates of the toner cartridge with replacement end plates. In yet another aspect of the present invention, an imaging drum unit may include modifying one or more end plates of the imaging drum unit. In another aspect, an imaging drum unit may include replacing one or more end plates with replacement end plates.