Hi Dennis -- I missed that thread the first time around -- very cool. That big board looks like fun! I was also really impressed with the James Gray pics. Looks like he has longboarding behind the boad dialed! I tried doing some hang 5s and 10s on a borrowed longboard behind the boat last year, but I think it just had too much rocker. Perled every time I got within a foot or so of the nose.
I used to have a 9'6" Stewart longboard when I lived in CA. It was a pintail model that had very little rocker. It was a good one for 5toes. I also added a "Turbo Tunnel" pictured below - that enhanced the "noseridablity" of the board. Maybe I should figure out how to get that board back!