Tension is not that import. Just remove the wrinkles. True. I even wrote that myself somewhere on this forum, I think.
But you always create tension when you bend battens, else they would remain straight in their natural form. And this tension will now be applied to an end-point further away from the leech, more to the front of the sail, resulting in a curvature a little bit more to the front of the sail. Again, every camber has the same goal, but the reflex tensioner will help with this, I think.
And then last but not least, there will be no tension at all in the batten at the end between reflex tensioner and leech, allowing better twist and more S-shape according to me. I would like to see those reflex tensioners more in detail to see how easily they allow the negative bending during overpowered conditions.
IS87 / IS101 / IS122 / US147