Digital BW, The Print

Just received and installed a brand new set of quad black inks from 
Lyson for my i9900.  Using a new print head I put them in and using 
Lyson's recommended driver settings made a print on each paper I have 
to see what it looks like as you can't tone the print so whether it is 
warm or cold depends on the optical brighteners of each individual 
paper.  Metamerism appears to be a BIG problem with these inks.  On 
certain papers it appears red-violet under incandescent light and then 
green-blue under daylight.  Never really neutral.  Anybody with 
experience with Lyson quad blacks on other older printers care to 
offer some advice on technique to get some consistency or better 
performance?  Thanks- Paul