I am putting a 9" buoy in the bow and stern of my kayak for simple floatation and using Russ's bungie way of fastening it in tight. The loop on the left will be inside of an eye bolt fastened in the stern and bow and as you pull on the cords at the right, they become thin and allow the buoy to slip tight into place. Then letting go of the bungie cords swells them back to full dia and lock the buoy in. Thanks for the idea Russ.

John