Mistral 16’ sailing dinghy has a centre board. On the underside of the hull on either side of of the centre board there are two 5’ long 3/4” wide plastic strips attached with rivets into the hull and holding two fabric strips through a which the centreboard passes as it is raised or lowered. These plastic strips have dried and cracked into shorter pieces that can rotate and block the center board. What method should be used to attach replacement plastic strips. Could screws be used instead of rivets?