No havent used rivets heads MRBILLY was one of the many things i did try in the process but they would have to be stuck on somehow or welded these are all one piece of plate no extra parts, but the holes were perfectly round to start with but when useing the tool i made to raise the holes it sort of distorts the edge of the holes only ever so slightly,so good eyes, but that pic is a real close up as wanted to show as much as possible