Hi chaps, any ideas on the following?

On the set up in this pic and in the doodle, would the balance panels be set parallel, or set with slight toe in or toe out??? What say ye? The rudders are all closed loop controlled, slop free with a short pushrod to the balance panels, again slop free. I'm just wondering whether they'd pre load them against airflow at neutral to possibly stop any flutter around centre?

Many thanks, Ian.