I am in the market for a new solar cover. I have a 16x32 above ground oval. In looking at the prices for covers a rectangular cover is $20.00 less than oval, in the same size. In my experience with the oval covers they just have rounded edges and still have to be cut to fit. Any reason not to buy the rectangular cover, since I am going to have to cut it anyway? Or is there something about the rectangular covers that makes that unworkable?