I am using a top down furler from Colligo marine on a hunter 42 passage 1990 as you may know tis boat is very fast for a 25000 lb cruising boat . I am sailing at 9.5 knots in12 knts of wind and can sail at 40 to 45 degres up wind this is a large A3 v series 1.5 oz from North sails way to have some real fun and great speed.