I was asked to submit a proposal to remove 1300 sq.ft. of bluestone from around a pool and replace it with pavers. It is beautiful bluestone ranging from 3'x3' to 1'x1'. The homeowners don't like it, however, because the corners are sharp and a few of the stones have cracked. Anyway, they want the bluestone removed and a completely new patio installed. I dug down with a shovel and the bluestone was sitting on 12" of stone dust and there has been very little settlement over the past 12 years. The customer isn't too excited about ripping everything out and doing an entirely new base (not because of money but because of the mess). Should I go down a full foot with crushed stone and geo or can I get away with 6"?