Lol, remember that being a good extra, got me thinking back to an incident at my vauxhall days again, mid 90's, mk1 corsas were great sellers new, the merit came with nothing and a rear wiper was a good up sell for us, we had an auto electrician who fitted them no problem, one day he fitted one to the wrong new car, no problem yeh just fit another to the right car...not us, wiper was removed and put on the right car, the hole left on the other new car was filled with a rubber grommet and simply handed over, but in those days you could get away with murder in this job.