I messed up one of mine too – referenced the wrong long edge as my parallel side. It's not the end of the world, but if you are trying to make it correct to factory, the outside edge of the running board should be the parallel side. Glad I got some extra material from you!I have enough for his longs. I messed up cutting mine out and wasted some vinyl, otherwise I would have enough for a set of shorties too. Sorry.