Joerg that would be my question as well.
I had already contact with Stade sails, which Martin Birkhof advised in an other post.
He is very enthusiastic about his full length battens sail from Stade.
Yesterday I checked the website from Incidences but couldn’t find anything about full length battens sails.
I had contact with them last year when I asked for a proposal for a new main and mizzen on our A54.
When taking about battens they where even negative about short battens as in our Démé sails.
So I’m not sure if they will be positive about full length battens in their sails.
It could be a good idea to bring them a visit as we’re both in La Rochelle