Completely new to the pool world, bought a 32'x16'x52" ultra frame XTR. We've almost got the ground completely leveled checking everything with a Transit. Need advice on what to do under the pool for a smooth base for the liner. We have rocky soil and were thinking about doing a base of Mason sand under the liner only. But I've seen posts where using sand for a smooth base has voided Intex warranty, the pool has sunk, the sand gets washed away etc. Is using sand a bad idea? Should we be using a foam(no idea which one) underneath instead? If so what kind of foam? Anything else needed besides the ground tarp sent with the pool from Intex? Also for pavers for legs, what thickness is needed? (We got some that are 12x12 and 1.5" thick, is that okay?) We have worked ourselves silly doing this all by hand over the last two weeks and don't want to ruin all of the hard work by messing it up now.