i been using 2 15lb weights from my weight bench for some time now. at first i tried them one on each end of the boat so i could park with my side to the hole and drop in a few more lines, but the current on my river seems pretty fast it just drug them around everywhere. so i doubled them up on the same rope. havnet had any trouble since, but was wondering if tri-fluted river anchors are really worth the money? and do i really need 30lbs? also share any of your redneck boat anchors!