Hi Ron, These pools were never popular here in Arizona so I have only seen a few. The last one I put a liner in turned out a mess. It seems the walls were much shorter than 48" if I remember correctly. I would take careful measurements before ordering a liner.

I use a sod cutter for all of my sod removal and leveling. It leaves the surface a lot flatter and more workable. A bobcat may seem faster but in the long run I do not believe it is the best method of sod removal or precise leveling.

I would use masons sand for the base. 3-4 tons should do. If fill is needed I would go with what is recommended for your local area.

I would like to make a request to anyone out there with experience working on this type of pool to jump in and help Ron out.

Thanks, Dennis