The verticle spar piece sandwiches between this piece and the existing doubler at the floor side wall junction. Marked the rivet lines on 6ZU3-1 then tapped it into place, used flat blade screwdriver from below to coax the steel gear leg bracket open a little so this would fit in. Lined up the lines, drilled, clecoed and bolted back together. Had to get AN5 bolts because the AN4's wern't long enough.
