I take 2 five gallon pails and 2 80 pound bags of concrete and 2 approx 8 foot lengths of galv chain. Mix one bag each in a 5 gallon pail (only a little at a time, if you put it all in at once you will not be able to mix) while the mix is still wet tie a knot at one end of the chain and force the chain to the bottom of the pail. Let set up and bury so the top of the pail is approx 2 feet below the top of the ground. Place one under the main beam and one under the rear beam. Do not chain or tie to the dolphin striker go around the beams for better support and less stress on the dolphin striker in strong winds. Total cost approx $25, is your boat worth it?