Digital BW, The Print

I will shortly be receiving a set of UT FSN inks that will be going into
an Epson 7000 printer. A note I got from Paul Roark got me thinking 
about
which inks to put in which positions. The instructions with the QTR 
software,
which I intend on using, says one can chose their own positions.

The options seem to be; having the dark gray in the Cyan and the 
Magenta locations
and the medium gray in the LC and LM positions.
Or
the dark gray in the Cyan and LC and the medium gray in the Magenta and 
LM spots.

Does anybody have any thoughts about this, or even better,
is somebody using this combination of printer, ink and driver
and has already figured out the most practical use of ink locations ?


TIA

J.Z.