We have a 54" depth oval we're planning to install when the weather breaks. We've decided on a Foam Board base instead of sand, with foam cove & foam wall liner pad. Also planning to put the Armor Shield Floor pad on top of foam board before installing the liner. With that being said, we have a Uni-bead/JHook liner so will the base height be tall enough to properly support the "pre-fitted" J hook liner? The original instructions using a sand base calls for a 3-4" sand base under the liner & if we use the foam board, we're no where near that height. Will the liner still be ok? Do we need to add base height with double boards or a combo of sand & boards or what's your thoughts? Anyone have this problem with this type of liner?