Work-in-progress - 2009-01-07
Thanks to some changes Robert has made to Gutenprint, GPLin can now obtain the raw channel names (and the order in which they're printed!) in a more robust manner. I shall cut a new pre-release with these changes in place in the near future.
Lars Tore Gustavsen has kindly sent me a .ti3 file containing the readings of a GPLin run on his Epson R2400. A graph of its output is presented here. Note the interesting crossovers between channels: