Mark McKay SET, PE is the world’s leading authority on the real history of the E.V. Gray technology. His 12 year analysis of this unique Free Energy phenomenon has opened up new possibilities into reverse engineering this very powerful, yet lost discovery. Mr. McKay has 35 years engineering experience in industrial power and control systems. He is presently employed by Tyco Fire and Security in Spokane, WA as a Sen. Project Engineer developing large scale Fire Alarm Systems. He received a BS in electrical Engineering from New Mexico State in 1974 and is a Professional Engineer in the State of Washington. Mark posts here frequently http://www.energeticforum.com/renewable-energy/3235-gray-tube-replication.html