They were run like a machine, not a hobby. A senior engineer—often a seasoned soldier—set the layout and checked every joint. Every crew member had a single, rigid role: load, aim, fire, or repair. They used standard parts, so a spare arm or spring could be swapped in minutes. A strict inspection schedule kept wear in check, and any deviation from the set procedure was met with swift correction, because a single flaw could mean the difference between victory and failure. Efficiency came from relentless discipline, not cleverness.