Jim,
I would be glad to share the design. I would make a few changes but it is a good board just the way it is. It is more stable than it needs to be I would possibly take some width out of the back end and gain some speed and responsiveness. I would also consider a straight back like most SUP's instead of the pointed back it was difficult to strip the rails because of the tight curve. The front was not as difficult to strip the rails but I have decided I like vertical straight ends of most SUV's better and it would be easier to strip and add a little speed possibly. I made the deck flat for dog passengers and yoga (it is my daughters board I couldn't do yoga) I would probably put some arch on the front 1/3 of the deck. Other than that I am very happy with it. Running fence material through a thickness planner for the strips worked great. I have not seen it all summer, it went to collage but it is getting used a lot. Just let me know where to send the plans, you could probably find them on blue heron also.
Scott