Finsihed match drilling the bottom skin on the right flap and then moved to match drilling the top skin on. I then attached and drilled the left flap top skin per the plans. I did screw up and grabbed the drill with a #30 bit in it and started drilling holes in one of the ribs on the right flap - thank god for "oops rivets" (they fill the hole of a #30 or 1/8" but the head is the same as a 3/32" rivet) - duh!!!