I've discovered that my printer suffer from vertical banding, though it only seem to be on one or two channels (at least this is what is manifest it self like, on some photos there's no trace of it at all, and it seems to be depending on the tone of the ink...).
I've tried the head align for UNI-D ALL, BI-D ALL process, a cpl of times already, with no success at all. When printing in color I used the Epson driver, and had no problems at all, but now for my Piezography using QTR this all of a sudden showed up from nowhere...
Any ideas? Advice?