I have a standard P8000 that needed a replacement head a few years ago (when it was ~ 4 years old). I think I had 2 inks showing slight blockage and was able to keep printing for a month or so (light duty). It eventually started showing banding on prints though and at that point I got it serviced using the One Time Service plan. I would not use a standard service call/visit though, it will cost more than the OT Service.