Testing the Foundation

I climbed down from the cushion to examine the perimeter. By the base of the wooden shelf, three thick wooden coasters were lying flat. Their edges are straight and cut square. I picked the first one up. Good weight. I placed it evenly on the rug, then aligned the second one directly on top, flush with the corners. The third went on last. I pressed down firmly with both hands to test the balance. It held without shifting. The structure is stable.