We're down to the wire on getting our pool ordered up, and our PB has informed us that the square corners that my wife has been talking about all of this time are not possible. We are considering both the aluminum coping (bullnose, lower-profile, etc) and are not ruling out the concrete cantilever edge. We've seen both the square corner aluminum coping and the square concrete cantilever edge with a 6" radius liner so we know that's possible (both happen to be auto covers). We have also seen the square concrete cantilever edge on a non-auto cover, but am not sure if that pool has a 6" radius on the liner or not. A 6" corner radius on the liner seems to come highly recommended so we don't want to jeopardize that, but the square-corner look from above is almost as important. The question is, is the 6" radius liner corner with a no-radius coping/edge only possible with an auto cover?