Digital BW, The Print

I am currently investigating substituting MK in the glop position of
my R1800.  Image Specialist's PK on Costco glossy paper with no glop
is not significantly different than PK with glop.  And I prefer either
one sprayed with Print Shield over no Print Shield.  Therefore, there
is no advantage to the glop position, at least in my mind.  Putting MK
in the glop position using QTR would give me 2MK1PK and allow me to do
gloss and matte color and B&W ala Paul Roark (almost) without changing
carts.  Even better, I could install the CIS I mentioned in another
post today.

My question to the group is whether anyone has tried Paul's 3MK
approach using 2MK1PK?  A search of the forum only found posts about
using dye inks to do this.  I don't want dyes for reasons we all know.
 However, PK on matte surfaces does not give the dmax that MK gives. 
My thought is to use QTR and gradually blend in the PK just like the
MK.  My concern is that the resulting black of this 2MK1PK approach
may have a noticeably lower dmax.

The only disadvantage I can think of other than the dmax issue, if it
exists, is not having a nozzle test for the old glop/new MK position.
 Has anyone tried this and what were your results?  Any thoughts?
Thanks All!

Bob Marsolais