Digital BW, The Print

Hi All,

I'm currently using a 1160 with the vm-s inks and Paul's curves.  I
followed Jerry's suggestion and subsituted generations black for the
MIS black.  I thought all was well until I printed the new step wedge
that Tyler came up with (If I have that wrong I apologize).  It shows
a pretty severe jump in density between 55-60% mark.

I've read through the archives to try and understand the whole curve
adjustment procedure but I'm still a little fuzzy on the whole thing.
 Can anybody that uses the gen4 black offer any words of wisdom? 

Thanks,

Richard Cooke