Hi Scott,
You can very easily select up to 5 sounds (layers) for right hand, and 3 sounds for the left hand (or second keyboard).
After you create your own USER MULTI SOUND, you just have to save it.
400 presets are offered out of the box for the Ketron SD2, that make it sounding a lot more good than before.
The registrations are here too !
You can save the right hand sound with the registration, as well as your 10 favorites sounds for that song, for direct access, as well as the JPG score of the song displayed on a second screen...
All is fully controllable by PC/MIDI
You can do everything you want.
Just look at the varranger forums, to see how things are going on, and how buyers are happy
http://www.varranger.fr/vforum/ Let me know if you need more informations
Dan