Ok but Edison was looking for the bigger picture. He wanted to make electrical light and was looking for the technical solution. The reason why adjustable boards fail, is because people just look to make things different or adjustable boards for the reason of adjustable boards. If you look how to make your boat faster you will come up with good ideas.
By the way there is still a huge potential in board design, if I look at the current "state of the art" at beach cats...

Cheers,

Klaus