There's nothing complicated about the on the fly triggered chord sequncer feature.
At any time while playing live in auto accomp mode, you can enable the chord seq to begin rec the chords recognized by the Kb's auto accomp engine, and then when you press a button to stop recording, the auto accomp simply loops continously on the chord progression recorded. This then frees up our ability to play the entire keboard any way we want without having to play a restricted set of notes to satisfy the rigid chord recogition of an arranger's limited chorf recognition table. There's no cheating involved. in fact quite the contrary as it allows a pro keyboard player to fully maximize their playing potential and pianistic possibilities.

I hope Yamaha and Ketron will see fit to add this feature now as well.