Trying to improve laser drills into space-defense weapons was easier but less straightforward. We had to leave them mounted on original cradles; was neither time, steel, nor metalsmiths to start fresh. So we concentrated on better aiming arrangements. Call went out for telescopes. Scarce—what con fetches along a spyglass when transported? What market later to create supply? Surveying instruments and helmet binoculars were all we turned up, plus optical instruments confiscated in Terran labs. But we managed to equip drills with low-power big-field sights to coach-on with and high-powcr scopes for fine sighting, plus train and elevation circles and phones so that Mike could tell them where to point. Four drills we equipped with self-synchronous repeater drives so that Mike could control them himself—liberated these selsyns at Richardson; astronomers used them for Bausch cameras and Schmidts in sky mapping.