I had some washout around a couple of the wall panels. Had to take the panels down and reinstall. Skim coated the entire bottom with Vermiculite/Concrete mix. I did ok. Not perfect but acceptable.
I used pennies to help hold the liner in place while installing. Unfortunately the liner is not the right dimensions. One of the sides is 16 inches too long. There are arrows in each corner.
My pool is a fairly standard hopper as far as the perimeter goes. 16 x 32. One of the longs sides is appr. 33' 4".
Sending some pictures.