Scott, with the G1000, you can play the arranger and at any time, engage the chord sequencer..it will record the changes, in real time, allowing you to re-trigger the chord sequence[looped]..you can change the style,tempo, variations, fills etc..
While continuing play, re-record another chord sequence[what ever lenght you want], push the chord sequencer start button again..and you are good to go....all this without any hesitation or saving of the chord sequence..But, if you like, chord sequences can be saved for quick loading in the future..