RE: New twin design project
My Rule of Thumb works well for twins or float planes. I have not applied it to a float twin, but since you are now looking at an area x moment of .00735, I suspect you will be fine.
Your latest plan looks right, and as we all know, "If it looks right, it will fly right"
I must say, I have followed your designs for several years, and they are spectacular. I have lusted after each, and this one is no exception.
Jim