Working on my 2d of these Walmart hollow dock chocks. Works okay but only okay - boat's parked on a bit of a slope and over time the tongue wheel crushes the chock and rolls off. And the time factor isn't very long with Oklahoma summer sun & heat. Does anyone make a solid chock? Better yet, a solid chock on a base that's at least 12" diameter/square. I've looked at Amazon and a few trailer-supply places but all I see is more of the same; local boat dealer only has virtually identical chock.