Using 1 instance of Kct for a multi sound and separate outs in Cubase gives you better control of your individual elements. That's nice.You get 1 big sound for every note you hit on the keyboard with a lot of tweak ability.
But If you set up the same 1 instance of Kct(save ram) but want 5 instruments with their own midi notes ,not a multi sound,.....how do you do that? Is that a Cubase thing...?