Thanks Jack, good point.
I was wondering about the "blue" as I saw no reference to the heat treating. I'm going to call Samson and Colligo and talk to them both. Then I need to actually calculate my static load and go from there. I'm wondering if there are any deferences in their testing and parameters for the figures they give. But If Samson is not doing the heat treating, then that would explain the difference in the ratings.
I like these kinds of problems and design puzzles....this is going to be fun! And in the end may boat will be so fast it will pass wind
Gary