Seeing that rig reminds me of the question that people with windsurfing background always ask me: With all the new technology around, why do catsailors still fasten their battens with bits of string Do windsurfing type adjusters really add that much more weight ?

No, and the windsurfing rigs are really nice, high tech and cheap, Our rig has camber inducers and an allan key to adjust the batten tension.