Digital BW, The Print

Following up on my own question in the hope of inspiring someone
out there to help. In short, has anyone successfully used MIS's K4
inkset in ABW mode on the 2400?

My nasty suspicion is that the reason I get greenish casts in the 
shadows is that the K4 inks don't match the Epson K3 inks closely 
enough in tone to make ABW usable -- that actually what's happening
is not that the shadows are greener but that the lighter tones are so
much warmer in K4 that the print overall is no longer properly
balanced.

--Daniel