In revisiting Strange Ross's website,
http://axp.psl.ku.dk/~ross/
I noticed that he has a very detailed workflow for using Piezo Inks
to produce film positives for use in preparation of photogravure
plates. This may be of interest to advanced users as yet another
alternative to either the Piezo or Epson drivers.
http://axp.psl.ku.dk/~ross/Pos1_Int.html#Overview
Martin Wesley