Just random thoughts.
If you have factions within a force and they all use the same kind of designs it may appear a little confusing for players or observers (example being overgrown kitty cat furballs from SFU).
Thought. Add a layer to game piece prototype; the individual force one allowing invisibility during movement.
Then add a force or clan symbol graphic to the layer which can be turned on and off.

Paul
[attachment=0]Iron Patrol 2.png[/attachment]