Refilling went smoothly, there is enough equipment here (syringes and Kanüllen), with the ink I'm now a long time out ...! A star deduction gibts because to me this was no description. I was informed at Youtube. One then only needs a drill with max. 2 mm and off you go. My printer has unfortunately still the error message ink empty and apparently there for my cartridges still no chip resetter but the problem I hope to get more grip. A cheap alternative is for sure. And the print looks okay to me.