Worst I've seen was at a Muscle Car Review magazine show in Sacramento in 1989. Our GTS was freshly painted (the correct color), but didn't have the stripe on it (horizontal stripe). There were a handful of other minor things that were not 100% correct. I told them not to judge my car, but they insisted so I said, fine. At the same show was a clone GTS convertible (no docs, wrong color, wrong upholstery, lots of things wrong). As the three judges approached our car I overheard one of them stating that our car had the wrong wheel opening moldings. I told him that mine had the correct moldings. These guys were supposed to be "experts", but they had seen the clone first and did give him an award (yes, it was a very nicely done car, but far from concours).