Thanks for responding. I have never seen it either. I had installed a new liner; that liner had a bad seam. After a big headache with the liner company, the local pool company (where I bought the liner) came to install yet another new liner. The first day, they had a vac hooked up to the skimmer, but it was not sealed off. The liner was across the steps but the molding was not installed, I have no idea what the vac was supposed to be doing. The pool company assured me that the liner would "go into place" by the force of the water. It does fit well, no creases or anything on the bottom, but the top above the water line seems a bit loose. I guess time will tell. I mainly wondered if anyone had ever seen this method.