I'm playing my PX-330 in a gig which requires very fast changes between patches, often without any break. Searching for the correct button on the keyboard to change registrations often takes too long. Is there a way to set up a key or a pedal which can be pressed to cycle through registrations? Or is there a simple software solution to store and change registrations? I've previously used mainstage, however I'd rather use the sounds from the keyboard rather than the software.