I found out from the pool store..... In case anyone needs to know, you measure he wall height. My liner is a beaded or j hook type so you can't just overlap the extra.

Now off to find someone who can give me some pointers on the install. I installed the pool about 12 years ago, so hopefully it'll come back to me. I'm just going to do a re-rake and possibly add a very small amount of sand to beef up the cove area.

Cooper