This plane is a KILLER bird ! Here is my take .. they will all work, but IF you use the Gorilla glue be dang sure you know how it expands, or stand there and wipe it because it goes crazy !

As for the glassing the center joint.. I am not sure it matters, with the inner and outer cabanes /struts , I really don't think the load on that joint is as extreme as if it was a one piece monoplane wing.