Digital BW, The Print

I have a used (new to me) 7000 that I just set up with K6 inks.  This 
printer was initially setup with piezotones several years ago, 
developed a clog, converted to cleaning carts and left sitting.  The 
owner flushed with cleaning fluid 1-2 times a year.  I did an initial 
fill with flush then installed the K6 inks.  Printing a step wedge 
using QTR (better/ordered) reveals a nice ramp but there's very fine 
banding around 15-35% which disappears until 55-75% then it disappears 
again.  And the 100% block has pronounced banding (fine white lines).  
Oh, and the text is slightly blurred with stray tiny black dots.  Other 
than those problems, it's a nice ramp! :)

I have done a couple of KK2 cleanings, let the printer sit overnight x 
2, Windex on the pads, Windex paper towel on the head, alignment (tough 
to do with the black ink dot spray).  Nozzle check reveals all the 
nozzles firing with no gaps.  I also tried "adaptive hybrid" in QTR 
which made it slightly worse.  Any ideas?

Thanks!!!

Jenny Ellerbe