Parabolic Sanding

Because the tops and backs are going to be radiused, there is a need to make the surfaces to which they will be glued MATCH that radius. How to do that? Many ways, but here they have a parabolic sander. What the heck is that? It's a dish that's domed to the proper radius and covered with a sanding surface. The sides of the guitar, along with the neck block and the end block (to which they are glued) are held in place by a mold, and the dish spins underneath it, sanding all the surfaces (the blocks and the edge of the sides) to the proper radius. Cool, huh?