Hi Darryn,
thanks for the hints. Please could you specify what is wrong with sail shape and battens (e.g. too much camber, too flat, too hard, too soft, etc.)? Maybe you have a picture of a well shaped sail, which you want to post.
There are tell tales in the sail, but the poor quality of the digital camera makes them hard to see. However I know where and when the sail stalls (just above the boom). But I am not (yet) able to stall the sail at the top as well (e.g. cannot close the leech enough?).
Thanks.
Cheers,
Klaus