Got some more work done on the seat rib sub-assembly. The AB4-250 arrived from Vans so I was able to make the spacers I need. That then enabled me to continue match-drilling the rear bars and bulkhead. I then edge-finished one of the fwd outboard ribs but the wound on my sanded finger keeps re-opening, not too mention a blister I have on my right thumb from edge-finishing last night! I didn't know building an RV was such a painful experience! Anyway, I gave up for the night and I'll try to finish the main sub-assembly of ribs and bulkheads tomorrow night Oh, and I match-drilled the two electric aileron trim brackets too...