I have recently run into the issue of having no orange in my prints from an Epson 9900. It is also very difficult to discern the orange pattern in a nozzle check. I have used the QTR calibration mode to print a 10 color strip and it prints well. I have had the printer for 3 years. I have run piezoflush through using INIT FILL. I have also replaced the ink selector unit. I am now at my wits end as to what could be causing this problem. Any help?