Digital BW, The Print

Question for you Epson experts.   I am happily proofing on Ilford smooth pearl with UT7 inks 
with the Photo black.  Prints looks great.  I want to be able to switch back and forth from Matt 
to Smooth Pearl.  Is there any thing that should prevent me from dedicating a PhotoBlack Cart 
to Ebony for those occasions I want to switch just the Black ink?

My concern here is that 2200 forces a weird switch over when changing the Black Carts....ie 
wastes a lot of ink.

 Is there something that would make a PhotoBlack Cart loaded with Ebony lay down a 
different quantity of ink as opposed to a Matt Black Cart with Ebony?

Makes sense to me to stay with one basic set and only switch a dedicated different cart with 
the same chip.  But when I switch to Matt (Ebony) and more expensive papers...I want to get 
the optimum output that I am used to.

TIA

Phil