I concur with Judy on loosening the topping lift when sailing on small boats as I nearly represented most over the years. However, I think I know the issue. Remember Hunter with the B and R rig with no backstay. Many daysailors do not have backstays but the mainsail is designed to a standard factor. However, it could be the Hunter 170 daysailor is larger using the method of the larger boats calling for more power in the main.. If the batten sticks out too far, it can be shortened. Thus maybe I understand Bobbyfunn
Judy, I hope this helps.
Judy, I hope this helps.