I just received your printed samples on Friday, and checked them today.
Based on the printed 21 step strip you provided, your output linearization is nearly perfect, and dMax is 1.61, which is normal for Photo Rag paper.
One thing that immediately jumped out at me is the yellow color staining in your highlights, caused by stubborn yellow color ink remaining in the line and/or damper. I recommend you do a few more power clean cycles or print pure sheets from the yellow channel to eliminate the color staining. Instructions for printing pure ink from an individual channel can be found here: http://www.inkjetmall.com/tech/content.php?144-Print-Ink-Separation-Image-thru-QTR-Calibration-Mode
Other than the yellow cast to your highlights, I feel your output is good/correct.
Please let me know if you have questions or there's anything else we can help you with.
Best regards and happy printing~ Dana