My pool builder installed 9x9inch flagstone skimmer covers with like a 1 inch hole in the center. They are about one inch thick. One of my covers broke has anyone here ever cut their own out for a replacement? My question is how did you cut out the hole for your finger to lift the skimmer cover? What type of hole saw did you use? I have spider hole saw bits but I'm afraid those won't cut through flagstone. Thanks