got some pvc locks last week, and i finally had time to unpack them. got them off a guy on pirate. they look good except that from the shipping/packing process, they arent exactly round. should be 16" i.d. and are semi egg shaped on all four, they measure about 16.25-16.5 on one side. got them sitting in the sun right now to see if they soften up enough to put some pressure on to make them round again. any other ideas? btw, they dont look like regular pvc, are black in color. maybe hpde or something? i dunno, not a plumber. how should i go about putting a chamfer on the inside of the lock so it doesnt cut the tire? or should i worry about it? do the stock hummer locks have a chamfer on them? i was thinking of like setting up a router with a 45 degree cutter, or something on the mill, but am unsure.