3,000-mile screwdriver
n.— «We run largely a decentralized system, and it’s important that we continue to do that. I once worked with a person who talked about the 3,000-mile screwdriver making those fine adjustments. We trust our base commanders.» —“DoD News Briefing” by Bernard Rostker MW Presswire June 1, 2000. (source: Double-Tongued Dictionary)