How the two parts of sheet metal are joined together? How are the reinforced inside?

Make me think of a design like a zipper, but I don’t know at that scale what would work, magnets?

Maybe there is a way to transfer the loads to more than two container without making it too complicated. Anyway you can always start to operate in the best wind conditions and scale up from there.

Love the idea, the simplicity and integration with the current system is genius! Wish you great success.