Attached the baggage ribs onto the lower skin. Had some difficult angles near the reinforcement braces of the steps. Nothing insurmountable, but definately need the 45 degree angle on a small bucking bar. Attaching the skin to the baggage ribs wasn't inherantly difficult, but when your helper keeps putting the bucking bar on clecos instead of the rivets it sure makes it difficult to not dent the skin. Frustrating, but tough to be upset with free help when its needed.