Splain how you assemble a buttblock with only 1/2 inch plywood ??? I am about to attached my 1/2 inch meranti to the bottom of my boat. The plans call for using a buttblock for the bottom. I intend to use a scarf joint on the bottom and perhaps a buttblock. Buttblocks look so clunky. Splain how you assemble a buttblock with only 1/2 inch plywood ??? I do not understand how you can pull the boards tight with only 1/2 thick stock.