I've had problems with the boat turtling. Catalina sold me what seems to be a foam cover, about 2 feet long, that appears to go over the top of the jib (not a roller furling boat). Don't see any discussion of this device on the forum, but maybe I missed it. Has anyone ever seen one of these and have any advice on how to use it and what it's impact is on performance? Wouldn't use it racing.