Hi everyone! I currently own an MO6 and I love the fact that I can assign 4 different voices to the four zone faders and control them all independently. What I DON'T love is that I run out of polyphony fairly easily this way. Soooo...I'm looking at the S90XS. I see that it has 128 voice polyphony, but can I assign voices to those zone sliders like I currently do with my MO6? Being very limited in regards to hands on experience wiuth new instruments out here in hawaii, I wanted to be sure I could do this before I pulled the trigger on this purchase.