Kruckelberg started out in the trucking business by putting in hours at his father's plant, Spray Control Systes. Now he runs the whole outfit. It was one of the first companies to enter the U.S. market using plastic rather than metal to manufacture fenders. Since Kruckeberg assumed 100 percent control of the company from his father in 2006, it has grown from annual revenue of $5 million and 12 employees. Now expansion is in the works. Its Blooming Prairie facility is about 70,000 square feet; Kruckeberg plans to expand it another 50,00 feet by 2014.