Digital BW, The Print

I hate to ask this here but I am about to buy an MIS CFS for my 2100 and I need to 
check one thing.  I was intending to order the Archival Colour Pigment CFS, not with 
Universal Black but with Ebony.  This is as a result of (a) I mostly print on matt paper 
incl HPR and (b) the success people have had with Ebony BO and a spray on RC 
papers.  As I still print colour I am unfortunately not yet ready to consider the UT 
2200 ink or the Ultratone B&W although I am tempted to order UT 2200 cartridges 
and go through the swap process.  (How easy is it to have two CFS and swap between 
them?)

[FYI, this is starting to get very confusing.  Just at MIS you will have several B&W inks 
for the 2100/2200.  MIS says that the Ultra-tone B&W inks don't work with Paul's 
curves. They will then presumably add the UT 2200 which will...?]  

My question:  I am worried that I can't print colour on RC papers (eg Epson Premium 
Semi-gloss) with the Eboni ink.  I don't mind having to spray the image as I would do 
this anyway.  Has anyone who has dabbled with BO on RC with Ebony tried colour on 
RC with Eboni?  Does it work?

I guess I could always just throw in the Epson UC PK cartridge for colour RC but it 
would be nice not to have to.

Thanks

Steve