Trying these out today as I have been thinking they are a good idea for years on trailing edge of square tops.
Chance for you to tell me how mentally challenged I am Wouts.
How are you going to tie it in?
Don't you need a hole somewhere to tie it into the batten pocket?
Yes, I photographed them the minute I had fitted the batten snugly and just after this photo I marked the holes and drilled them.
All works well.
As it happens a friends giant carbon wing sail was destroyed in a storm last year and I will form the batten out of the sides of that once I have had feedback about size etc. so the weight can be reduced.