 These are times of growth and promise here in Michiana, and Majority Builders is a strong contributor to that can-do business attitude. Evidence of that success is all around us, including the new 315,000 square foot Communications Test Design Incorporated building in the Ameriplex at Interstate 8090 Industrial Park in South Bend. CTDI is a global engineering, repair and logistics company providing best cost solutions to the communications industry. The developer wanted the best. They chose Majority Builders.