Slayn: Yes, you can improvise such a component.
Tyndmyr: After the third shot, he falls from the sky, unconscious and soon to be dead. The fourth shot goes wide, but you're pretty sure no one will be getting to him in time.
Acanous: Take off every Zig. The bomb launches, catapult obviously straining under its weight. The siege engineers aim a particular direction this time; trying to hit a cluster of clerics 65 feet from the walls (85 feet away). [roll0] (Profession: Siege Engineer). The shot is off by a bit; and none of the clerics take the crushing damage; it's a mass of zombies that take that. 6 of the clerics are within the bomb's blast, however...