Now, beginning with the eighth layer of planks, I am approaching the rounded edges of the forms, which makes planking tricky.  Bending and twisting the wood strips to fit the forms tightly and on top of each other is time consuming.  It also puts a tremendous amount of pressure on the strongback, so it is important to glue them to each other well.  As you can see, the ends of the planks over hang the stems a bit, but this will be sanded flush once all the planks are installed.