I’ve been donated a 9900 that has been sitting in storage for over a year with orange and green completely clogged. Possibly more. I have yet to pick it up.
I’d like to try reviving it with PiezoFlush. Load it up with carts, run two initial charges, let it sit a day or two, then see what happens when I print nozzle checks.
Do you advise changing the ink selector unit, as well as the pump & cap assy and the wiper blade, before trying this in case the dampers are all gummed up after a year in storage being unused? I would consider converting it in a Piezography printer if enough channels are working, so the parts would not entirely be wasted.