QTR-Quadtone RIP

I want to make sure I've got the QTR profile logic straight.
I have a 9600 running Piezotones with a RIP, a 2400 with OEM inks and an R800 with an 
NK7 split tone. If I am satisfied with calibration and linearization on all 3 devices can I 
print the 51 step target through the RIP (StudioPrint) with my normal print settings, read 
patches with the Eye One and Measure Tool and create an ICC profile that will accurately 
softproof my RIP output?

On the 2400 I have built a color profile with Eye One Match. If I print the 51 step target 
using ABW mode with the color printer profile, I can read patches with the Eye One and 
Measure Tool and create an ICC profile that will accurately softproof the Epson ABW driver 
output?

On the NK7 setup, I understand (I think) that the linearizations are wrapped in IJM's 
proprietary profile. So I can print the 51 step target using my normal QTR print settings 
then read patches with the Eye One and Measure Tool and create an ICC profile that will 
accurately softproof my QTR output?

So all I'm really trying to accomplish is to characterise my current output for softproofing. 
Do the above steps achieve this? THanks.

amadou diallo
www.diallophotography.com