You crack me up, Douggie.
The kn still is the worst SOUNDING harmonizer, but the Korg has virtually no user control, except for that vocoder-like treatment of how many voices...which makes it almosy unbearable for me. I trigger the harmonies with my chord hand - how can I adjust the harmonies and still get full sounding chords? Hmmm.

The PSR have a few major hangups in control, but at least, it sounds good and gives you choices. Too bad you can't sustain it with the rhythm OFF, or play it in chordal mode from the right hand. It'd be much more friendly for me.