I have re-read this thread and apologize for not responding sooner. After making notes of the info you supplied and reviewing your order history, I have a few questions.
In your first post, you said you replaced ink in your refill carts.
-Why did you replace ink in your carts?
-Did you empty carts, then refill with fresh ink from new bottles?
-Did you do Power Clean Cycles or an Initial Fill Cycle after installing carts with new ink, or install carts and continue printing as usual?
You said the printer had sat unused for about five weeks prior to refilling the carts, and was working before refilling. Did you make a test print after the printer sat for five weeks, before replacing ink in the carts?
What ink was the printer previously set up with?
In an earlier message (post #6), I asked you to clarify exactly what inks you're using in this printer, since I see you've purchased Selenium shades 1-7, as well as shades 2.5 and 4.5.
Please tell me what Piezography ink shade you have installed in what color position of your printer.
Do you have a densitometer?
"Nozzle Still Clogged" message can be avoided by turning off the automatic nozzle checks in your printer setup menu. Your printer is automatically reading nozzle checks, and can't "see" shade 7, so gives the "clogged" error.
Please let me know, so I can help you get back to happily printing.
Best regards~ Dana