Step 20 (AKA steps 32, 34, 37 and 39)

Most of the way through step 20 - Nose ribs on, skin on, drilled and
clecoed. Made a drilling template for drilling the skin vertical
surface that attaches to the spar. Ground down rivet squeezer and
installed flat-headed rivets for ribs, including rib #1. Still missing
felt, larger wires. Tired, back hurts... whine whine whine...