Digital BW, The Print

>Is it possible to make Curves adjustments that look Fine on screen 
(even at 100%) but contain too radical of shifts for the Piezography 
to handle?

You might check the histogram just before printing. If you see 
any "comb" effect (areas of missing data) whatsoever then Piezography 
could print it as you describe. Although Piezography software is 
capable of producing stunning prints from a great original file, it 
shows no mercy to anything more than small curve or levels 
adjustments. And yes, Piezography software can definitely print a 
posterized print even though it looks fine on your screen. The 
original Piezography was not a color managed system, so what you see 
on your screen is not necessarily what you'll get off your printer. 
The new PiezographyBW ICC system using profiles, on the other hand, 
IS a color managed system so if your equipment is color managed then 
what you see on your screen is exactly what you'll get. A really nice 
feature. Also, the new PiezoICC system now uses the Epson driver 
which is much more forgiving to aggressive curve and levels 
adjustments.