You bet I have.
Just two days ago I was joining two wing halves. The wing joiners only go in one way, so I put arrows on them so I wouldn't get them in up side down. I only had 30 minute epoxy so I was going to epoxy the joiners in one wing half, then mix another batch and join the wing halves. Well sure as hell I got them in the wrong way. I even had them in right and took them out and put them in the wrong way. The wing was on the building board top side down. I drew the arrows to point to the top side. Brain farted and put them in with the arrows pointing up. And I was proud because I thought I caught an error and fixed it.
That was plane 47.

Greg