I had such a laugh yesterday after my friend, Chris said, "Have you seen Roger's new stringers?" and I walked around the corner of the surfboard factory to see a mini forest of logs.
Surfers will know that the stringer is the thin strip of wood that traditionally runs down the middle of the surfboard. The wood is typically made of balsa, although this is poplar, and the thickness increases the strength and rigidity of the board. Some boards have multiple stringers for added stiffness. Here's a shot of a board with its single stringer that I lifted from Roger's Surfline website..
You've got to agree there are a lot of stringers there waiting to be integrated into surfboards of the future.