Words to live by: If it ain’t broke, don’t fix it. Surely Sam Presti and Clay Bennett of the Oklahoma City Thunder have heard that expression, as both are smart, successful businessmen with good educational backgrounds, although they are a generation apart in age. Presti is the wise child who built the Oklahoma City Thunder from scratch, taking over at age 30 on June 7, 2007, prior to the team’s final season in Seattle, renting a small apartment with his then-girlfriend near