I use a Roland sustain pedal (the one with the rubber heel flap) assigned for sustain and a Yamaha FC7 Volume pedal which is assigned to affect the three Right Hand voices only.

I learned how to use the sustain pedal with my left foot, so I can use the right foot on volume...I'm used to using right foot from back in the Yamaha/Hammond organ days.

Everything else is triggered by hand, registration changes, style fills/variations, SA control, turning style parts on/off etc.

Ian