Ok I just found this post from Matt. I have been reading the Crashed In Thread.
BUT .........
We do have cove. It is Gladon Foam Cove.
We followed the Manufacture's Instructions for Installation.
1. Black Mil Plastic
2. Happy Bottom
3. Bottom rails
4. Walls.
5. Foam Cove
6. Wall Foam
7. Liner

We do not have 2" of sand or other material on the bottom tho.

The wind was blowing the liner like a kite... Serious Pain the rear.

Good advice all the way around.
Especially your PM about the liner.
Will follow your advice.

Thank You,
~Hoffmans