Ok I have 2 upstairs toilets that are giving me fits. As far as I know, they have aluminum flanges, I'm assuming original to the house, which is about 50 years old. They are connected to cast iron lines that appear to be in very good condition and flow very freely. These flanges aren't what I'm used to seeing. I guess they are not really bolted to the floor in anyway that I can see, but are set in the probably 3/4 inch of concrete that is the subfloor for the upstairs bathrooms. Then there is about 1/2 inch of the flange folded over on top of the tile. So there is no slot in the flange for a toilet bolt. Rather, the bolts screw down into the floor, into an anchor I'm assuming. Well one bolt on one toilet broke off, halfway down into the anchor..nice. The other bolt/anchor just came completely out of the floor. Do you think I'm better off just getting new toilet flanges installed? Would this be a very complex and expensive job? Obviously a little sheetrock would need cutout to access underneath. Any ideas are appreciated.