I've received so much help from the experts in this forum I thought I'd take a moment to share a solution that I developed with with the forum. During each winter, I grew tired of having to pump puddles off the cover after each rain. I've seen some postings about pool cover frames that allow rain and leaves to run off. I thought I'd give it a try, and it worked... right through a direct hit by hurricane sandy! I built a pvc frame to lay over my air pillows, and laid the cover over it and attached water-filled jugs to the cover eyelits to keep the cover taut around the perimiter of the pool. So far it has worked great. I will be glad to post photos, but I don't know how! I'll post them in a reply if anyone posts instructions. Thanks!