I can't see any good reason to separate the wings any more than the full scale has them. As light as the planes build and with the lift these type of planes generate, typically flying isn't an issue. FYI the full scale has 5 degrees incidence and 5 degrees dihedral on the top and bottom wings and 5 degrees incidence on the stab.
Another way to measure your wing separation is to take a front view, measure the wing length vs separation and compare that to your plane. It will give you a ratio without involving the fuse. I say that because you may not know if your fuse is the proper size.