Digital BW, The Print

Bought Piezo B&W package (including CIS) for a dedicated 1160 a year 
ago.

One day cloged, the next day banding, the day after a strong blue 
shift on glossy papers, etc...

And these warm tones... How can it be considered as a black and white 
print?

As a result, a couple of prints acceptable, hundreds of $ spent, and 
a huge frustration concerning a digital solution for B&W prints.

Is there any other solution, more efficient (it should be easy when I 
read the last comments in the NG about Cone and Piezography) and less 
expensive?

Is MIS quadtones and Paul's curves the way to go?

JYRiggs

PS: I'm not here to engage in polemic against Piezo. My wish is to 
find a good solution for printing B&W pictures as an expert amateur.