> As I have said the layup you recommend is not sufficient. Doing repair
> work on a wooden boat on a rocky beach on the North Shore of Superior is
> not easy even in the summer.

And all we have is your word for it. Canoes and kayak using layups similar to what I use have been paddling the north shore of Superior for 30 years and people have found the layup sufficient. I'm sure some have needed repair, but if you think you have a layup which will never need repair, patent it.