I have used purge patterns to draw Piezoflush through the ink lines of my R3000. Of course, as has been mentioned here, that method does not fully clear the ink that remains in the dampers. I have heard that it would take a few dozen cleaning cycles, to draw fluid all the way through the ink lines. But, how many cleanings would it take, just to clean out the dampers?
I have given up on the idea of using the service utility program, because of too many practicality issues—like the fact that it will only work with completely full cartridges, and it will not work over the wireless network.
On a related note, can anyone recommend a cheap or free QTR, that I could use for purging purposes? I just need something that will allow my to focus on individual ink channels.