Attaching a solar cover to a reel on an oval pool

[Watermom]

Take a look at this: www.solarroller.com.

That is what I now use on my pool after trying several things previously. (Solar covers, though really helpful, are just a big pain to deal with!) This works pretty well.

[PoolDoc]

Interesting. There are some videos on the website; here's one: https://www.youtube.com/watch?v=VIOLEhIxcLg

And there are some interesting reviews -- mostly positive -- on Amazon:
Solar Roller @ Amazon.