Brief Description: Drilling pilot holes to bottom skin, left wing
I had already marked up the rib & longeron positions on the bottom skins some months ago, so after carefully moving the wing framework off the table, I then proceeded to space the rivet positions, approx. 64 mm on the ribs & 32 mm on the longerons & skin laps.
I the drilled the pilot holes in 3/32. (More back straining work)