Same problem - fixed mine
Stu -The aft 6" or so of my centerboard flaps were loose when I purchased the boat new. After towing the boat several hundred miles, 18-24" hung down (probably made worse as the loose ends flapped in the wind).I made an "emergency" repair with a name-brand Exterior Mounting Tape (a 2-sided tape) from a big-box hardware store. The tape is 1" wide and meant to be used to mount house numbers, etc. - claims to be weather-resistant, but no claim of being waterproof. However, this "temporary" repair has worked better than the original factory adhesive, has survived 2 seasons of numerous launches and over 3,000 road miles.Only downside was crawling under the boat to install the tape!