Digital BW, The Print

I read on the MIS website that this ink may produce better results 
for BO prints. 

I'm new to B&W printing and liked the idea of BO printing, but 
results so far from using UC inks (on a 2100) have been very warm 
toned. Too much so for my liking, with many photos lacking punch and 
not contrasty enough.

I'm waiting on UT7 inks to arrive to try BO with Eboni black which 
hopefully will improve on the UC matte black. 

My question to Paul (or anyone who has tried).

1. Will PKN ink work with UT7 inks in the printer.

2. Will this ink show improvement only for gloss paper 
(recommendations?) or for matte as well.

3. How is this ink different from using Eboni Black or Photo Black 
of UT7 inks for the BO process?

BTW, I'm using EEM and PR at the moment.

Paul, if you're reading, thanks also for sharing your expertise on 
this forum..brilliant!