QTR-Quadtone RIP

Jenny & Olivier:

I have been using a 1280 with continuous flow
piezography inks (selenium toned) and using the ICC
profiles and getting outstanding results.  I have
tried using the QTR on my 4000 (and my 2200) and have
not gotten anywhere near the detail in the shadows
yet.  I know I have to spend more time with QTR to get
those customizations.  But I control a lot of the
image quality within Photoshop doing everything in 16
bit.  Using levels and curves to tweek the image gets
outstanding blacks, good shadow detail and excellent
highlights--nothing I have yet to be able to reproduce
in QTR.  If anyone has any thoughts how to really
maximize QTR on the 4000 to get the same quality, I am
all ears and would appreciate the help.

Mike