 The drive shafts ran within the integral rungs, and were operated by a crewman with a ratchet hand tool.The two drive shafts comprised a short shaft and a long shaft; both starting at the trunnion end of the lifting frame, one running half the length of the lifting frame while the other ran the full length.The short drive shaft operated the pivot clamp around the rocket midsection, which could move the rocket 28 mm (~1") forward or backward along its centreline.