I'm not sure of the other Hunter's, but on the new 50 CC with the in-mast furling main, the three vertical battens are only at the top of the sail, and appear to be only 4 to 5 feet in lenght. This modification may have been made due to the problems that a lot of owners were having furling and un-furling the mains with the full length battens. We have a 45 CC and are in the process of seeing if our sail can be converted to one with the shortened battens.
Jeff