There are different options for you when you think about optimizing your equipment. Let's say that you sail with a Neil Pryde RS: X 9.5 sail and want to get the overall weight down and want to get a little better light wind performance. Here you would be able to optimize the battens.
The swiss firm NB-Fins, has worked on adding custom made carbon battens i formula and slalom sails, and have for example for a 2008 Gaastra Vapor 8.2 m2 (8 battens and 4 cams, approx. 6.6 kg) saved 46% ( form approx. 6.6 to 3.6 kg) of the weight and 54% of the inertia on the batten kit.
