private final UnitValue[] getPos(ComponentWrapper cw, CC cc)
	{
		UnitValue[] cbPos = null;
		if (callbackList != null) {
			for (int i = 0; i < callbackList.size() && cbPos == null; i++)
				cbPos = callbackList.get(i).getPosition(cw);   // NOT a copy!
		}

		// If one is null, return the other (which many also be null)
		UnitValue[] ccPos = cc.getPos();    // A copy!!
		if (cbPos == null || ccPos == null)
			return cbPos != null ? cbPos : ccPos;

		// Merge
		for (int i = 0; i < 4; i++) {
			UnitValue cbUv = cbPos[i];
			if (cbUv != null)
				ccPos[i] = cbUv;
		}

		return ccPos;
	}