I'm trying to hang these double-walled metal waterers. But, the handle on the top is an oval. That's what I'm attaching to an S hook. However, there's no notch in the oval handle to keep the S hook in the center of the oval. Sooooo, it's just a matter of time before the waterer slips cockeyed and spills all the water. What am I missing here? This seems like such an easy thing for the maker to put a notch in the handle. Ugh. I can do some handy sorts of things, but I don't know how to bend this sturdy metal. Advice?