It that thing laser-cut? The ribs have that typical brown look.
I remember ads for those planes back in the day. Nobody in the area ever built one. Reasons were the terribly bad quality of Berkeley kits and, as you said, crash damage.
One local design, the Orbiteer BC by John Kilsdonk, utilized the slide-in I-beam wing like your photos show. The slide-in I beam was a popular concept around here and was used on numerous one-offs and personal designs. The ribs could be sliced off with no scrap loss and were easier to cut than regular ribs.
The slide-in construction allowed table top wing framing with a minimum of fixturing.