Fitted two parts to the step assembly the wrong way around, left on right side and vice versa, they were seperated from a single piece and did not look that different and it was only when I tried to rivet the skin down onto the baggage ribs that it just would not fit properly, had to remove quite a few rivets to allow me to get at the bracket and remove them and switch them over, rivet them back in place then rerivet the skin down to the ribs, lesson learned. The first two pictures show the parts before removal, because you don't rivet all the way back to the end of the ribs I didn't cleco back that far either, but it also explains the slight alignment issue with them the wrong way around, if it don't fit, you have done something wrong....