Hi Sam,
Thanks for the response. I took some similar pics and posted them to the other site [because I'll be damned if I'm gonna go upload pics someplace else so I can post them here since RCU removed that feature, but that's a story for a different discussion].
I've never seen the split (two-piece) spars before, and I've never seen what looks like balsa-laminate ply used on a large model like this before. The absence of shear-webbing is puzzling, too. When you say you plan to reinforce with glass, can you explain where? I'm contemplating glassing the bottom skin of the wing with heavy cloth exactly over the area covered with the invasion stripes, since I feel like the balsa sheeting is really the only tensile structure keeping the wing from folding in G's. Then I would just paint over that with black/white to mask the glass. Maybe I'm over-reacting and this is all fine, but my instinctive first-sight reaction was to be spooked.