FYI- I ran into a bug regarding the Deliverance cannon. I had 2 firing upon an enemy world. The one fired and the other was lining up for attack. The first cannon converted the world, but the second cannon (I guess having seen that the world was now neutral) just paused. I could not cancel the action. Even when that same world was retaken by the enemy, the cannon still did not fire. I had to scuttle it and rebuild a new one.