Laid out sequence to rivet on W904 bottom skin on right wing to determine whether I want to attempt to rivet alone. I don't think I do. Removed wing flap from right wing. Cut access hole in conduit for wire bundle to the aileron servo. Also drilled a hole and installed a bushing for the bundle to pass through the rib to the servo. Began fitting the Gretz pitot mount. Drilled holes in base plate except along spar flange. Fabricated angle to attach to rib and base plate. Drilled holes into angle from base plate and clecoed together. Fit to rib and spar and clamped. Drilled holes into base plate from spar. Removed pieces. Laid out three #30 holes for the angle to the rib and drilled. Reattached to rib and drilled holes.
