Glue strips of 1/4 inch minicell to the bottom of the saddle insert. Roughen up the inside of the boat a little with sandpaper. Finally glue the saddle into the boat with contact cement. It works great and is fairly easy to remove when it's time to convert back to K-1. Also, it keeps you from having to drill holes in the hull. Make sure you have the saddle in the right spot before gluing. Better take it to some flat water and get a friend to help you position the saddle for the best trim before you do anything.