Hello. I intend to buy a K2700 very soon but would like to clarify something in advance. I will need to set up a multi with a piano layer, a KB3 layer, and possibly one or more layers/splits. When playing the multi, will the sliders and other controllers still act as KB3 drawbars etc.? Hopefully I could assign knobs to control the volume of layers (instead of sliders)? Can a K2700 (or PC4) owner kindly advise me?