QTR-Quadtone RIP

I have finally been able to dedicate my old 2100 to QTR and am
starting with standard UC until I get comfortable with curve creation
in a "2k" system.

I am trying to create a warm curve for HPR.  I have tried as a base
curve the EEM curve in the QTR distribution and also Mr. Schofields
HPR curve at
http://homepage.mac.com/WebObjects/FileSharing.woa/wa/default?user=scho&templatefn=FileSharing2.html&xmlfn=TKDocument.2.xml&sitefn=RootSite.xml&aff=consumer&cty=US&lang=en
I am creating step wedges of non-linearised curves in all cases.

For all my tests I'm getting density reversal in the 100% step (using
the 21step.tif file).  I'm getting around 19.1 to 20.2 L* in this step
depending on my adjustments, and a good ramp from around 18.5 L* on
the other steps.  All measured with EyeOne/MeasureTool.

Have tried adjusting black boost, gray overlap (even up to 100%),
shadow adjustment but to no avail - the 100 step is always lower
density. The curve uses only Mk and Lk as you would expect.

I know this is a little trial and error involved but after about 20
experimental step wedges I figure some advice and guidance would sure
be appreciated,

Regards,

--Kip