I installed a permanent skeg on my S&G Night Heron to reduce the weathercocking. The skeg is one inch deep and eighteen inches long. It works great. Having the skeg located along the keel near the center of the kayak allows the kayak to keep some of it's maneuverability and greatly reduce the weathercocking. This works well in wind and rear quartering waves. I used a piece of plywood for a template and duct taped in different locations until I got the handling I was looking for. The farther back the skeg is located will reduce the weathercocking more but also reduces the maneuverability and can cause the kayak to leecock. The sweet spot for me was just behind the cockpit. Here is a link to some pictures. http://good-times.webshots.com/album/550783422yZRHWQ