I had just used the shrinking stake to form the pie crust ridges now being hammered out.  I need to turn the edge of the piece into a more severe curve at this point. Using a heavy ball faced hammer I'm hitting the high point of the ridges and thickening the metal as I draw it out towards the edge. This is what's happening when shrinking, the metal is being compressesd along this edge.  I love seeing the metal gathered up then flattened again as it's being thickened and then smoothed out again.  I can't explain why I enjoy  this but maybe I don't need to. This operation is done directly on the steel plate, as you can see.  The form can be rolled on the flat surface to position the area to be hammered on.  By the way, I'm drawing the metal out towards me as I work out the ridges and this also helps to pull down this section of metal.