QTR-Quadtone RIP

I have been printing with Cone K7 inks for a while now using the
Ergosoft Posterprint RIP with good results.

I have run into some unwanted issues just the other day that makes me
feel like I am lacking enough control of the Nuetral Piezography
inkset using Ergosoft's RIP so I decided to try the QTR paired with
the Eye1.

So I am into the process of setting up a profile and I run into my
first issue.

I have made it to the point where I have determined where the inks
overlap with their densities and I am now getting ready to enter this
info into the Curve Creator and I am simply perplexed by what I am
being asked. Density and Limit

I know to set my default limit at what I used to print the grayscale
patterns/stepchart. Although to follow I am asked for the density and
limit for each ink. 

I feel I have the density number from measuring the density of the
step-chart for each ink and then finding that density in the next
darkest ink but how do I come to the limit for each individual ink?  

I am completely new to the group and appreciate anyone taking the time
to point me in the right direction.

Kindest Regards,
William Tiemann
www.digiditions.com