From experience, the 20L HDPE water cubes will last years in direct sunlight. Might need to use bigger washers around the anchor points in this design? I imagi

From experience, the 20L HDPE water cubes will last years in direct sunlight. Might need to use bigger washers around the anchor points in this design? I imagine the holes would be the weakest points, and increasing the contract area would spread the stress out over more plastic.