Digital BW, The Print

hello everyone. i recently purchased an epson 4000 and mis eboni ink
to do bo printing, and have a few questions:

1. in clayton's bo printing with the 2200, he mentions selecting
enhanced matte paper and superphoto 2880 dpi. however, 2880 dpi
appears to only be available on the 4000 when glossy papers are
selected. 1440 dpi must be used whenever any matte papers are
selected. can someone with a 4000 please either confirm that this is
true, or point me in the right direction to use 2880 dpi with matte
papers.

2. i printed a few bo portraits on premium lustre using the epson
photo black and liked the results, even if just a little too brown for
my taste. can someone who has printed bo on glossy paper using mis pk
please describe how the pk compares to the epson photo black.

thanks very much,

louis