i have just acquired an old desk jet 670c from my dad part from being old it is in fine working order. there were two cartridges in there already one colour and one black. now as i do most printing well all really in black and white the colour wont be used i imagine but i am interested in being able to refill the black one myself. have got a kit with the tools and inks to be able to refill it but i seem to have mislaid the instruction sheet that came with it. does anyone know of a site where i can go to get a tutorial on how to refill this particular models cartridge. it would be very much appreciated