Digital BW, The Print

Hey, all you helpful folks!
I'm into my first day with the new Piezotones (installed last night).
 I'm getting very fine white banding in a regular visible pattern.  I
now get consistently good nozzle checks and have done several
alignments and gotten that looking pretty good.  However, the numbers
on the alignment checks have  fine white "dropped out" lines through
them one or sometimes two lines width.  The scattered dots I was
getting beside the alignment check lines are fewer and closer now. 
Whazzup?  I think I may have been getting some of this banding before
the CIS change, but the alignment check numbers didn't have the white
lines through them with the old CIS (I found some old alignment check
sheets).    Any help much appreciated.  
Chris