I am in the planning stages of a flagstone patio, laid in crushed stone. One side is going to be a quarter moon shape, the other side will be boardering the edge of a deck, which is a few feet higher. One side is the house. overall there is about a 5-7inch drop off, i dont think that using 6x6's would be feasible, with curve. any other suggestions. Is there any type of basic material that could be used. I am ready to hear what everyone has to say, so lets hear it.