QTR-Quadtone RIP

Hi all:

I have spent several months trying to understand and perfect my curves and icc using an 
Epson 2200 and NK7-Sepia tone inkset on a Mac with PS CS2.  I have several questions 
regarding my process follows...

First I print out the ink seperation.PSD file in calibration mode (with no color management) 
to determine ink limits...when I look at this print after it dries, it seems that Ink 1 (K) 
should be 30% but that other inks begin to level off at different %, for example Ink 2 is 45% 
and Ink 5 is 55% 

I chose to the limit for Ink 1 and reprinted the ink seperation file is this correct?

I then determine the relative % black for each shade of gray and enter these values into a 
ink descriptor file and then create curve to print out the 21 step wedge to generate the 
data to linearize the curve---are you suppose to assign the 21 step to 2.2 grayscale or 
leave it as is?

I then used this linearized curve and reprinted the 21 step wedge with no color 
management to generate data for the icc

When I use Keith Coopers test print, I'm close but not dead on...any suggestions

thanks in advance,

Ron