Golfers, like inept mechanics, are quick to blame their tools. If their tee shots wander or their putts fall short, they are more likely to lay out $900 for new equipment than to practice or seek instruction. This faith in technology -- and in throwing money at a problem -- has brought thousands of duffers and millions of dollars to an eccentric California clubmaker named Clovis ("Duke") Duclos.
A former aerospace engineer, Duclos (pronounced doo-cloh), 53, is one of the most successful new entrepreneurs in the fast-growing field of high-tech golf clubs -- sticks designed to compensate for poor swings. His...