Digital BW, The Print

Hi All

I need some help.  I having trouble thinking in CMY(K) terms.  I'm after a strong "chocolate" 
hue.  

Firstly, I am puzzled as to why Epson put the R and G where they did.  You'd think it would 
make more sense to have the R at (53H,53V) and the G at (-53,53) (and applied a similar 
logic to C and M).  Then you'd have some bearings as to RGB or CMY(K).  (A more towards red 
would be +H and +V where H=V etc.)

(10,10) seems close but no cigar.  I feel like I am chasing my tale and printing a ton of step 
wedges.  Any ideas/pointers?

Steve