<p>WARRENSBURG- Owners Earl and Susan Walls are set to begin their 30th year of owning and operating the Central Missouri Speedway with their first races beginning on April 20.</p><p>Earl, 87, and Susan, 82, first took over CMS in 1994 after both being in different lines of work. Earl started Aspen Paper Products, a manufacturer of disposable paper plates, cups, bowls and lunch bags, in 1977 in Lenexa, Kansas that has since boomed to owning plants in Kansas City, Georgia and Virginia. Susan, meanwhile, worked in sales at the United Rotary Brush for 17 years.</p><p>Through his time in business, Earl was still a racer at heart. He raced quarter midget cars and loved the atmosphere created at a race track. So, he and Susan bought CMS once its previous owners put it up for bid, although it was in rough shape both physically and culturally.</p><p>“The only thing I knew about race tracks was I didn t like the way most of them operate,” Earl said.