I've had difficulties with the orange ink since switching to Cone inks. In pursuit of a solution, I changed to the newer pump station, and also replaced the ink selector. Eventually I discovered that the orange pigment had settled to the bottom of the cartridge, leaving a near clear, yellow fluid at the top. I've now started agitating the orange cartridge at least once a day. This has brought about some improvement, but I still have trouble getting a saturated orange. It usually fades to a near yellow, after a couple of days, in spite of the agitation. Is it possible that the orange ink is part of a defective batch? Have others experienced this problem?