Northern Michigan Golf: Shave 10 grams off the weight of a golf driver, and you’ll increase drive distance about three yards, so say people who calculate such things. Taking the idea to extremes, lightweight golf club developer John Muir, of Cedar (near Traverse City), engineered a driver-weight reduction of 65 grams—about 60 feet more drive distance when compared to average drivers. He targeted the innovation to women and seniors, who lose strength as they age. A Japanese firm makes the custom lightweight head, and the Traverse City entrepreneur attaches it to a lightweight shaft. We like the club’s name: Traverse. The Japanese symbol on the club is for cherry blossom. Muir has run a build-your-own gold-clubs website since 1996 and is a gold club DIY devotee himself.