A CS has no need to respond to anything other than simple MIDI notes, on the channel designated by the arranger as the NTA. It needs to clock TO the arranger (otherwise it will override your Performance tempo settings and any rits or accels you make) but other than doing that, the CS is nothing more than a simple MIDI looper.

You don't need 'Chord Events' or any of that malarkey. All you are doing is recording the MIDI notes played in the Chord Reception area of the arranger, and looping them back into the arranger unchanged.

Pretty simple, really....