Still missing the foil section. Plan form dimensions are useful. In my case I would literally take my existing Infusion short boards and add length till I had the same area as the long boards. I'd do some tweaking to keep an elliptical plan form at the tip (lower induced drag). The reason for doing this versus say copying the Mk. 2 long boards directly would be so I can interchange boards at will.

Looks like an Eppler section on these A-Cat foil (note the ridiculous amount of carbon): http://lindahlcompositedesign.weebly.com/install-curved-boards.html

Here's a layup for some F18 shortish boards: http://www.youtube.com/watch?v=k6AzcUBHEzU